Alfred Hart 1865-1869 Snow gallery around Crested Peak. Timbers 12x14 inches, 20 inches apart [Central Pacific Railroad, California. Scenes in the Sierra Nevada Mountains. No. 252]
Stereoview Internet - Original source ill-defined www.sportscards.com/item/a-a-hart-cprr-constructing-snow-sheds-1860s-central-pacific-rr-stereoview-sv/391975614001
