Ben Hains 1889 (copyright) 5. Old Saltpeter Pipes (1812) [Views of Mammoth Cave and vicinity]
Stereocard NYPL - New York Public Library Stephen A. Schwarzman Building / Photography Collection, Miriam and Ira D. Wallach Division of Art, Prints and Photographs, Record ID: 654413
`These are pronounced the very best specimens of Subterranean Photography yet produced`, Scientific American
