Armed with musket bayonet and showing accrouments (and a nice 1000 yard stare) here is a CDV of a soldier that saw the elephant. Nashville Backmark so with more research someone can probably ID who this is, the name Tulson ID'd written on CDV. The item "Armed Id'd CDV Civil War Soldier with Nashville Backmark" is in sale since Thursday, December 24, 2015.
This item is in the category "Collectibles\Militaria\Civil War (1861-65)\Original Period Items\Photographs". The seller is "bunderko" and is located in Oconomowoc, Wisconsin. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, AE, QA, KW, BH, HR, MY, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM.