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DNO-0048_Prospect Hill Cut.jpg
Carte-de-visite style photograph of the Prospect Hill railroad cut on the Central Pacific line by Alfred Hart. Photograph features multiple railroad workers and horse-drawn carts working on the cut. Caption: Prospect Hill Cut. Upper slope, 170 feet."
DNO-0049_East Portal of Summit Tunnel.jpg
Stereoview photograph #198 by Alfred Hart for the Central Pacific Railroad collection. Photograph features a railroad worker with a dump cart standing in the entrance to a tunnel in the Sierra Nevada mountains. Caption: "East Portal of Summit Tunnel,…