Canyon Hotel, Yellowstone National Park, from NPS slide collection
J.P. Clum lantern slide
<a rel="nofollow" class="external free" href="http://www.nps.gov/features/yell/slidefile/history/1872_1918/structures/Images/02769.jpg">http://www.nps.gov/features/yell/slidefile/history/1872_1918/structures/Images/02769.jpg</a>