| Alfred Hart Constructing snow cover. Scene near the summit [Central Pacific Railroad, California. Scenes in the Sierra Nevada Mountains. No. 246] 1865-1869 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00574 (digital file from original photo, front) LC-DIG-stereo-2s00574 (digital file from original photo, back) LC-USZ62-110743 (b&w film copy neg. of full stereo) LL/109055
| |