"Old South Shaft Ore Quarry, Face of Tough-nut Mine, part of Town of Tombstone, Arizona. Dragoon Mountains, with Cochise Stronghold in background," mammoth plate, by the American photographer Carleton E. Watkins. Courtesy of the Yale Collection of Western Americana, Beinecke Rare Book and Manuscript LIbrary, Yale University, New Haven, Conn.
<bdi><a href="https://en.wikipedia.org/wiki/en:Carleton_Watkins" class="extiw" title="w:en:Carleton Watkins"><span title="American photographer">Carleton Watkins</span></a>
</bdi>
1880
Beinecke Rare Book &amp; Manuscript Library, Yale University <a rel="nofollow" class="external autonumber" href="http://beinecke.library.yale.edu/dl_crosscollex/brbldl_getrec.asp?fld=img&amp;id=1064027">[1]</a>