Appalachian Community Histories – Saltpetre, Wayne County: Post Office, River Locks, Railroads, and Life Along the Tug Fork
Saltpetre is one of those Wayne County communities whose name almost demands an explanation. Tucked into the hills south of Fort Gay, the unincorporated settlement survives on modern maps, road signs, cemetery records, and in the memories of families who have lived along its branches for generations. Yet its documentary history is scattered through postal records, geological surveys, river-improvement reports, newspapers, maps, and family notices rather than preserved in one convenient town history.
The surviving evidence allows much of that story to be reconstructed. Saltpetre acquired its own post office in the early twentieth century, stood near an ambitious federal effort to make the Tug Fork navigable, developed within the railroad corridor running south from Fort Gay, and remained a recognizable residential community long after its post office disappeared. The most intriguing part of the story, however, reaches farther back. Published place-name authorities say that Saltpetre received its unusual name from a local saltpetre-manufacturing industry, while a 1919 Wayne County newspaper history independently remembered salt production in Butler District during the first quarter of the nineteenth century. What has not yet been found is the contemporary document that conclusively joins those two pieces of evidence together.
Before Saltpetre Had a Post Office
To understand Saltpetre, it helps to begin with Butler District.
Historically, Butler covered the southeastern portion of Wayne County along the Kentucky border. The West Virginia Archives and History place-name collection places Saltpetre in Butler District alongside Fort Gay, Prichard, Hubbardstown, Centerville, Echo, Erie, Merideth, Paddle, Pharaoh, Carrel, and Tudell. This matters because older records may describe a Saltpetre family simply as living in Butler District or near Fort Gay rather than using the smaller community name.
In December 1919, the Wayne County News looked back on the district’s early history. The newspaper described bottomlands nearer the river, rolling country farther inland, valuable building stone, early coal mining around Hubbardstown, and extensive stands of oak timber. It also made a particularly interesting statement: salt had been manufactured in Butler District during the first quarter of the nineteenth century.
That period reaches back to the earliest generations of permanent settlement in the district. The same newspaper account identified Samuel Short as an early settler near present-day Fort Gay around 1796 and Robert Tabor as the patentee of a 2,500-acre tract in 1798. Other families followed during the years around 1800, establishing farms and cabins throughout a landscape that still depended heavily upon waterways, trails, and the narrow strips of usable land between hills.
Salt production, coal, timber, farming, and river commerce therefore belonged to Butler District long before Saltpetre emerged as a formally recognized postal community. That older economic landscape is important when considering how the settlement received its name.
The Saltpetre Name
Hamill Kenny’s 1945 West Virginia Place Names, one of the standard works on the origins of West Virginia community names, associates Saltpetre with a local saltpetre-manufacturing industry. Armond and Winifred Moyer repeated the explanation in The Origins of Unusual Place-Names in 1958. Later reference works have continued to trace the name to local manufacture.
Saltpetre, also spelled saltpeter, is potassium nitrate, historically one of the essential ingredients in gunpowder. Across Appalachia, it was obtained from nitrate-bearing earth, particularly in caves, and processed through leaching and refining. Federal geological writing from the early twentieth century specifically documented saltpetre mining in West Virginia caves and explained its historical relationship to gunpowder production.
It would be tempting to combine that history with the 1919 report of early salt production in Butler District and declare the origin of the Wayne County community settled. The evidence does not quite allow that.
The Wayne County News said salt was produced in the district, but it did not say saltpetre. Kenny later said Saltpetre was named for local saltpetre manufacture, but the contemporary industrial record behind his statement has not yet surfaced. The two claims may describe related pieces of the same history, or they may describe different industries entirely.
For that reason, the safest conclusion is that the traditional explanation for Saltpetre’s name is strong but not yet proven by an early primary document. A deed, survey, tax record, newspaper notice, or the original postal application may eventually identify the operation that Kenny had in mind.
A Post Office Gives Saltpetre a Place on the Map
Whatever name residents may have used earlier, Saltpetre entered the twentieth century with a much firmer documentary identity.
Postal historian Thomas Lera’s Cave Post Offices, preserved by the Smithsonian Institution, lists the Saltpetre post office in Wayne County as operating from 1905 until 1950. Even more valuable is the surviving artifact reproduced in the book: an envelope fragment bearing a circular “SALTPETRE W. VA.” postmark and four-bar cancellation. The postal mark provides physical evidence that Saltpetre was not merely a name later placed on a map. Mail was being processed under that community name.
The timing is significant. Saltpetre’s post office appeared during a period when the entire Big Sandy and Tug Fork corridor was being transformed by transportation improvements, railroad expansion, coal development, and federal river projects. A local post office connected scattered households to that wider world. Letters, newspapers, government notices, catalogs, money, and family news could move through a community whose residents otherwise lived among branches, farms, hillsides, churches, and family cemeteries.
The National Archives preserves two record groups that could eventually add considerably more detail. The Record of Appointment of Postmasters can identify establishment and discontinuance dates, postmasters, appointments, and sometimes changes in postal service. The separate Reports of Post Office Site Locations frequently contain information about nearby creeks, roads, railroads, mail routes, neighboring offices, and sometimes hand-drawn maps. Because those site reports were part of the process of establishing new post offices, a Saltpetre report dating near 1905 could be one of the most important surviving documents for the community’s early history.
By 1921 there was no doubt about Saltpetre’s official standing. The West Virginia Blue Book, published by the state government, included Saltpetre in its list of Wayne County post offices alongside places such as Fort Gay, Glenhayes, Hubbardstown, Prichard, Webb, Dunlow, East Lynn, Wayne, and Kenova.
Geologists Come Through Saltpetre
Government geologists were also using the Saltpetre name before the First World War.
Charles E. Krebs and D. D. Teets Jr.’s monumental 1913 West Virginia Geological Survey report, Cabell, Wayne and Lincoln Counties, examined the county’s coal beds, stratigraphy, oil and gas prospects, soils, timber, stone, and other natural resources. Later federal geological indexing specifically points to a geological section at Saltpetre on page 161, alongside nearby observations at Powder Mill Branch and Glenhayes.
That seemingly small reference is historically valuable. It shows that by 1913 Saltpetre had become a useful geographic landmark to professional surveyors working through Wayne County. The name was sufficiently established that geologists could use it to describe the location of a rock section without further explanation.
The surrounding place names are intriguing as well. Powder Mill Branch appears in the same geological sequence. A place name involving a powder mill naturally attracts attention in a community traditionally associated with saltpetre, since saltpetre was a central ingredient in gunpowder. Yet a suggestive name is not proof that a powder mill there was connected to Saltpetre’s naming history. For now, it remains another clue deserving investigation rather than evidence strong enough to settle the question.
The Lock at Saltpetre and the Fight for a Navigable Tug Fork
One of the most important pieces of Saltpetre’s early twentieth-century story lies not in a local history but in the records of the United States Congress.
During the late nineteenth and early twentieth centuries, the federal government undertook an ambitious program of locks and dams intended to improve navigation along the Big Sandy River and its Tug and Levisa forks. Supporters hoped dependable slackwater navigation would allow coal, timber, and other products to move more cheaply and would provide competition for railroad freight rates.
Saltpetre stood directly in that transportation landscape.
In testimony and correspondence later printed in a 1914 congressional document concerning the Tug and Levisa forks, Charles C. Mackubin of the Glenhayes Company discussed the recently completed lock on the Tug Fork at Saltpetre. Writing in 1912, Mackubin argued that the new improvement had created slack water at the company’s station and could help coal operators use river transportation as an alternative to the railroad.
The river project helps place Saltpetre within something larger than a cluster of rural households. The community stood along a corridor where federal engineers, railroad corporations, land companies, coal interests, and local residents were all trying to determine how the mineral wealth of the Tug Valley would reach outside markets.
The struggle between river and railroad transportation would continue for decades, and rail ultimately became dominant. Still, Saltpetre’s connection with the lock left traces in local language. A 1938 Big Sandy News account referred to the area near the “Salt Petre locks” while describing the death of an elderly Wayne County woman struck by a Norfolk & Western freight train near Hewlett. By then, railroad and river transportation existed almost side by side in the local landscape.
Railroads, Roads, and the Narrow Valley
The Norfolk & Western became one of the defining features of life along this part of Wayne County.
Rail lines connected the communities south of Fort Gay with coal-producing country farther up the Tug Fork, while stations and sidings gave previously isolated settlements faster access to regional markets. Later Norfolk Southern railroad documents continued to recognize Saltpetre as a railroad location, placing the name within the company’s Big Sandy corridor.
The railroad did more than carry freight. It became part of the geography people used every day. Families walked along or crossed the tracks, freight trains passed homes and farms, and communities developed in the narrow strips of relatively level land squeezed between railroad, river, creek, and mountain.
Highways gradually altered that pattern without completely erasing it. U.S. Route 52 became the principal road through the corridor, and modern West Virginia transportation maps still preserve Saltpetre as a named place among the branches and roads of southern Wayne County.
Saltpetre Was a Community of Families
Maps and government reports show where Saltpetre was, but newspapers provide a better sense of who lived there.
Throughout the 1920s, 1930s, 1940s, and 1950s, notices in the Big Sandy News treated Salt Petre or Saltpetre as a familiar residential community. Those reports are particularly valuable because the newspaper was published across the river in Louisa, Kentucky, within the same Big Sandy social and economic world. The state line divided Kentucky from West Virginia, but families, churches, cemeteries, railroads, businesses, and kinship networks routinely crossed it.
An obituary from 1938 recorded the death of Mary Adkins Beaire at her home in Saltpetre. She had been born in 1848, long before the Saltpetre post office existed, and was buried in Wellman Cemetery after services at Lynch Methodist Episcopal Church near Saltpetre. Her children had scattered from Saltpetre to Charleston, Fort Gay, Idaho, and elsewhere, a small example of the migration networks that connected rural Wayne County families to industrial cities and distant states.
Wellman Cemetery appears repeatedly in the record. In 1933, Rachel J. Wellman was buried at what the newspaper called the Salt Petre cemetery. In 1936, Kizzie Wilson Wellman was buried at Wellman Cemetery at Saltpetre after a life tied to Wayne County and the Fort Gay area.
Other family cemeteries surrounded the community as well. Newspaper records mention the Philpott family cemetery near Saltpetre, the Workman Cemetery, and later Lynch Cemetery. These small burial grounds are essential historical records in a place that never developed a formal downtown, courthouse square, or municipal archive. They preserve the surnames of the families for whom Saltpetre was home.
Saltpetre During the Depression and War Years
The Great Depression appears in Saltpetre’s history through scattered personal records rather than sweeping economic statistics.
A 1936 Wayne County newspaper report identified Hershel Holt of Saltpetre among local men accepted into the Civilian Conservation Corps. Programs such as the CCC became especially important in Appalachian communities where farm income, timber work, railroad employment, and mining wages could all be uncertain. For young men from rural Wayne County, federal work programs offered regular pay while sending part of their earnings home to their families.
Newspaper notices from the 1940s show the community persisting through the Second World War era. A 1943 obituary for retired farmer Burrel Lynch listed his brother John Lynch as a resident of Salt Petre. Another report from that year described burial in a family cemetery near Saltpetre. These small references are easy to overlook, but taken together they demonstrate continuity. Saltpetre was not merely an obsolete postal name. People identified themselves with the place, buried relatives there, worshiped nearby, farmed the surrounding land, and used the community name when describing where they lived.
That continuity becomes especially clear in 1950. When James Melton Crawford died that October, the Big Sandy News described the seventy-nine-year-old retired farmer as a native of Salt Petre. Two of his sons, Richard H. Crawford and David Crawford, still lived at Saltpetre. One obituary thus connected at least two generations of a Wayne County family directly to the community.
The Post Office Closes, but Saltpetre Does Not
The Saltpetre post office apparently closed in 1950 after roughly forty-five years of service.
Closing a rural post office could make a community less visible in official records without causing the community itself to disappear. Mail might thereafter be routed through a larger neighboring office, while residents continued using the old place name among themselves.
That appears to have happened at Saltpetre.
The United States Geological Survey continued showing Saltpetre on later Louisa quadrangle maps. By the 1960s and 1970s, the maps depicted the settlement within a landscape of U.S. Route 52, the railroad, small churches, cemeteries, creeks, scattered houses, oil and gas development, and neighboring communities such as Glenhayes and Fort Gay.
The community name also continued appearing in family records. As late as 1961, a Big Sandy News obituary reported burial in Lynch Cemetery at Salt Petre.
There is even a tantalizing archival mystery from this period. The Jennings Randolph Papers at the West Virginia State Archives contain a file labeled “Post Office, Saltpetre, 1962.” Because the recognized Saltpetre office had apparently closed twelve years earlier, the contents could involve a request to restore postal service, a dispute over routes, a proposed facility, or some other community postal matter. Until the folder itself is examined, its significance remains unknown, but it may provide an unusually detailed glimpse of Saltpetre after the old office disappeared.
A House from the Post Office Era
Physical evidence of early twentieth-century Saltpetre survives as well.
A 2017 reconnaissance survey conducted for the West Virginia State Historic Preservation Office documented an I-House duplex at 21 Webb Branch Road and 3668 U.S. Route 52 in Saltpetre. The survey estimated its construction at about 1905 and recommended additional research.
The estimated date is striking because it coincides with the establishment of the Saltpetre post office.
That does not prove that the building had anything to do with the post office, but it places surviving architecture within the same moment when Saltpetre emerged clearly in the documentary record. More intensive architectural and property research could potentially connect the building to families appearing in postal appointments, census schedules, deeds, railroad records, or newspaper accounts.
In a small Appalachian community, an ordinary-looking house can sometimes be one of the oldest surviving documents.
What Happened to Old Saltpetre
Saltpetre never disappeared in the dramatic fashion associated with abandoned coal camps whose companies pulled out, and houses were torn down. Its story is quieter.
The postal office vanished. River navigation lost its importance. Railroad transportation changed. Schools consolidated. Automobiles and better highways redirected local life toward Fort Gay, Wayne, Louisa, Huntington, and other larger places. Families moved away for industrial work, military service, education, or better opportunities.
Yet Saltpetre remained on the map.
Modern USGS and West Virginia transportation mapping still recognizes the community. Saltpetre Road preserves the name. Churches, cemeteries, houses, and scattered residences occupy the surrounding landscape, while the old railroad corridor and Tug Fork remain reminders of the transportation systems that once shaped the community’s economy.
In that sense, Saltpetre represents a common Appalachian pattern. A community did not need incorporated boundaries, a mayor, or a commercial downtown to be real. It could exist because families shared the same creek valleys, used the same post office, buried their dead in neighboring cemeteries, attended nearby churches, traveled the same roads, and told outsiders that they lived at Saltpetre.
The Mystery Still Beneath the Name
The unusual name remains the most compelling unresolved piece of the story.
The published explanation is straightforward. Hamill Kenny said Saltpetre took its name from a local saltpetre industry, and later writers followed him. That explanation fits the vocabulary and industrial history of Appalachia, where saltpetre production once supplied the essential nitrate used in gunpowder.
There is also independent evidence that Butler District possessed an early history of salt manufacture. There is a Powder Mill Branch in the surrounding geographic record. There are geological references to Saltpetre itself by 1913. Together these details make the traditional explanation more than a random legend.
Still, good local history depends upon distinguishing what can be documented from what remains probable.
No contemporary nineteenth-century record located so far has explicitly said that saltpetre was manufactured at the Wayne County settlement or identified the people who operated the works. Until such a source appears, the safest wording is that the community was traditionally said to have been named for local saltpetre manufacture, an explanation preserved by respected West Virginia place-name scholarship but still awaiting confirmation from an earlier primary record.
The answer may be sitting in the Wayne County deed books, surveyor’s records, nineteenth-century court papers, or the 1905 postal application. Those records could reveal an older tract name, a mill, a nitrate operation, or a family whose property eventually became known as Saltpetre.
Remembering Saltpetre
Saltpetre’s history is not the history of one large event. It is the history of a place gradually becoming visible through many small records.
A district newspaper remembered early salt production. A post office opened around 1905. Government geologists used the community as a reference point. Federal engineers built a lock on the Tug Fork nearby. Railroad trains passed through the valley. The state listed Saltpetre among Wayne County’s post offices. Newspapers recorded births, deaths, accidents, migrations, and burials. Wellman, Workman, Lynch, Philpott, Crawford, and other families left their names in cemeteries and family records. The post office eventually closed, but the community survived it.
That is what makes Saltpetre worth preserving as part of Wayne County’s history. On a modern map it may appear to be only a name beside a road in the hills south of Fort Gay. In the documentary record, however, it opens onto a much larger Appalachian story of natural resources, gunpowder traditions, river navigation, railroads, rural postal service, family migration, and the stubborn persistence of small communities whose names outlived the institutions that first placed them on the map.
Sources & Further Reading
National Archives and Records Administration. Record of Appointment of Postmasters, 1832–September 30, 1971. Record Group 28, Microfilm Publication M841. Washington, DC: National Archives. https://www.archives.gov/research/post-offices/postmasters-1832-1971.html
National Archives and Records Administration. Reports of Post Office Site Locations, 1837–1950. Record Group 28, Microfilm Publication M1126. Washington, DC: National Archives. https://www.archives.gov/research/post-offices/locations-1837-1950.html
West Virginia. West Virginia Blue Book, 1921. Charleston: State of West Virginia, 1921. https://www.wvlegislature.gov/legisdocs/publications/bluebook/WVS_Bluebook_1921.pdf
Krebs, Charles E., and D. D. Teets Jr. Cabell, Wayne and Lincoln Counties. Morgantown: West Virginia Geological Survey, 1913. https://pubs.usgs.gov/pp/0853/report.pdf
United States Geological Survey. Louisa Quadrangle, Kentucky-West Virginia. 1939. https://pastmaps.com/map/louisa-lawrence-county-ky-usgs-topo-1939?div=179196
United States Geological Survey. Louisa Quadrangle, Kentucky-West Virginia. 1939 map, 1946 edition. https://pastmaps.com/map/louisa-lawrence-county-ky-usgs-topo-1939-p1946-1
United States Geological Survey. Louisa Quadrangle, Kentucky-West Virginia. Surveyed 1953, published 1955. https://pastmaps.com/explore/us/west-virginia/wayne-county/fort-gay/1950s
United States Geological Survey. Louisa Quadrangle, Kentucky-West Virginia. 1962, published 1963. https://pastmaps.com/map/louisa-lawrence-county-ky-usgs-topo-1962-p1963?div=179196
United States Geological Survey. Louisa Quadrangle, Kentucky-West Virginia. 1971, published 1973. https://pastmaps.com/map/louisa-lawrence-county-ky-usgs-topo-1971-p1973?div=179196
West Virginia Archives and History. “Districts and Place Names in West Virginia.” Based on the New Descriptive Atlas of West Virginia, 1933. Charleston: West Virginia Department of Arts, Culture and History. https://archive.wvculture.org/hiStory/communities/districtplacenames.html
West Virginia Archives and History. “Place Names in West Virginia.” Charleston: West Virginia Department of Arts, Culture and History. https://archive.wvculture.org/history/archives/placenames/placnams.html
West Virginia Archives and History. “County Records on Microfilm and Other Holdings: Wayne County.” Charleston: West Virginia Department of Arts, Culture and History. https://archive.wvculture.org/history/archives/bluenote.html
United States National Archives and Records Administration. “Census Records: 1850–1950.” Washington, DC: National Archives. https://www.archives.gov/research/census/1850-1950
Wayne County News. “Squibs From Early History of District in This County.” December 4, 1919. West Virginia Archives and History. https://archive.wvculture.org/history/wcn/wcn191204.html
Wayne County News. “Pioneer District: Butler.” December 25, 1919. West Virginia Archives and History. https://archive.wvculture.org/history/wcn/wcn191225.html
Wayne County News. “History of School System in Wayne County.” October 23, 1919. West Virginia Archives and History. https://archive.wvculture.org/history/wcn/wcn191023.html
Wayne County News. “Old Newspaper Articles, 1936.” Wayne County Genealogical and Historical Society. Includes Hershel Holt of Salt Petre among Wayne County men accepted into the Civilian Conservation Corps. https://waynewv.com/wcghs/oldsite/Old%20Newspapers/Newspapers%201936.htm
Big Sandy News. Obituary and local notices concerning Saltpetre residents, cemeteries, and families, 1936. Lawrence County Kentucky Genealogical and Historical Society. https://www.lckghs.com/index.php/en/obituaries/2-uncategorised/380-obit-1936
Big Sandy News. Obituary of C. M. Wheeler and Saltpetre family references, February 1938. Lawrence County Kentucky Genealogical and Historical Society. https://www.lckghs.com/index.php/en/obituaries/2-uncategorised/383-obit-1939
Big Sandy News. Obituary and local notices concerning families formerly living near Saltpetre, 1940. Lawrence County Kentucky Genealogical and Historical Society. https://lckghs.com/index.php/en/obituaries?id=384&layout=edit
Big Sandy News. Obituary of Alice Wellman Knode, July 14, 1944. Lawrence County Kentucky Genealogical and Historical Society. https://lckghs.com/index.php/en/2-uncategorised/416-obit-1944
Big Sandy News. Obituary of Lynn Boyd Crum Jr., March 16, 1950. Lawrence County Kentucky Genealogical and Historical Society. https://www.lckghs.com/index.php/en/obituaries/2-uncategorised/422-obit-1950
Big Sandy News. Obituary of James Melton Crawford, October 26, 1950. Lawrence County Kentucky Genealogical and Historical Society. https://www.lckghs.com/index.php/en/obituaries/2-uncategorised/422-obit-1950
Big Sandy News. Obituary notices concerning the Hughes and Pauley families and Lynch and Wellman cemeteries at Saltpetre, 1960. Lawrence County Kentucky Genealogical and Historical Society. https://lckghs.com/index.php/en/obituaries?id=432&layout=edit
Wayne County Genealogical and Historical Society. “Wayne County Cemetery Books.” Includes Wilson Cemetery at Saltpetre and Spears Cemetery at Salt Peter. https://waynewv.com/wcghs/wayne_cemetery_book2.php?thisPage=wayne_cemetery_book2
Lera, Thomas. Cave Post Offices. Smithsonian Institution repository. Includes the Saltpetre, Wayne County, post office dates of 1905–1950 and a surviving Saltpetre postal cancellation. https://repository.si.edu/bitstreams/868ad228-2c2f-4793-8d99-2be302c648c9/download
West Virginia Archives and History. Jennings Randolph Papers. Series 8, Government Agencies and Subjects. Includes “Post Office, Saltpetre, 1962.” https://archive.wvculture.org/history/collections/randolph/randolphgasf.html
West Virginia State Historic Preservation Office. Reconnaissance Historic Resource Survey for Pleasants, Lincoln, Jackson, Mason and Wayne Counties. 2017. Includes the circa 1905 I-House Duplex at Saltpetre. https://mapwv.gov/shpo/docs/PDFs/ArchitecturalSurveys/RMU-51.pdf
Kenny, Hamill. West Virginia Place Names: Their Origin and Meaning, Including the Nomenclature of the Streams and Mountains. Piedmont, WV: Place Name Press, 1945. https://books.google.com/books?id=61YlAAAAMAAJ
Moyer, Armond, and Winifred Moyer. The Origins of Unusual Place-Names. Keystone Publishing Associates, 1958. https://books.google.com/books?id=f4cIAQAAMAAJ
Hauer, Peter. “Saltpetre Mining in West Virginia.” Goldenseal 1, no. 2 (1975): 36. West Virginia Archives and History. https://archive.wvculture.org/goldenseal/gseal3.html
West Virginia and Regional History Center. “Maps, Atlases, and Gazetteers.” West Virginia University Libraries. Includes the 1933 New Descriptive Atlas of West Virginia, West Virginia Geographic Names, gazetteers, and Hamill Kenny’s place-name research. https://wvrhc.lib.wvu.edu/collections/maps-atlases-and-gazetteers
United States Congress. House. Tug and Levisa Forks, Big Sandy River, Kentucky and West Virginia. 63rd Cong., 2nd sess., House Document 1159. Washington, DC: Government Printing Office, 1914. Includes material concerning the federal navigation improvements and lock at Saltpetre. https://www.govinfo.gov/content/pkg/SERIALSET-06622_00_00-028-1159-0000/pdf/SERIALSET-06622_00_00-028-1159-0000.pdf
West Virginia Geological and Economic Survey. “Wayne County.” Geological, mineral, oil, gas, and mapping resources for Wayne County. https://www.wvgs.wvnet.edu/
West Virginia Department of Transportation. Wayne County General Highway Map. Charleston: West Virginia Division of Highways. https://gis.transportation.wv.gov/GISCountyMaps/PDF-WhiteBackground/WayneSheet%202WB.pdf
Author Note: Saltpetre is one of those Appalachian communities whose history survives in scattered postal records, maps, newspapers, cemeteries, and family memories rather than one complete local history. I hope readers with photographs, documents, stories, or knowledge of Saltpetre’s early industries will help preserve the parts of its story that remain undocumented.