A group of six (6) albumen stereoviews featuring California landscapes, railroad views, and pioneer scenes, each photographed by Alfred A. Hart and published in the 1870s by Carleton E. Watkins. Each on publisher's orange card mounts, with view title, series title, and imprints to mount recto. Views include: 

1. 41. Long Ravine Bridge, near Colfax. Length 1,050 feet. Series "Watkins' Pacific Railroad." 22 & 26 Montgomery St. imprint.

A locomotive situated on Long Ravine Bridge, its flatbed bearing logs and several hands who pose for Hart's lens.

2. 210. Loaded Teams, from Cisco. Series "Watkins' Pacific Railroad." 22 & 26 Montgomery St. imprint.

A mountain pass is crowded with laden wagons. 

3. 288. Looking across Truckee Meadows, toward Sierra Nevada Mountains, near Camp 37. Series "Watkins' Pacific Railroad." 22 & 26 Montgomery St. imprint.

An artistically composed landscape. 

4. 246. Constructing Snow Cover, Seen near the Summit. Series "Watkins' Pacific Railroad." 22 & 26 Montgomery St. imprint.

A beam is suspended, about to be pulled up by a construction team building a snow cover for the rail lines. 

5. 51. Bear River Valley, near Gold Run, You Bet and mines in the distance. Series "Central Pacific Railroad." 429 Montgomery St. imprint. 

6. 187. Summits of Sierras, 8,400 to 10,000 foot altitude. Series "Watkins' New Series." 427 Montgomery St. imprint. circa 1878-1881. 

Alfred Hart was the official photographer of the Central Pacific Railroad, and his negatives were acquired by Carleton Watkins in 1869. Watkins consistently reissued Hart's images as stereoviews under his own imprint, with his trademark technical perfection. Individually compelling and historically critical as a suite, these views unite the pioneering vision of Alfred A. Hart and the photographic mastery of Carleton E. Watkins to preserve the engineering saga of Donner Summit and the Central Pacific Railroad. 

[Transcontinental Railroad, Central Pacific Railroad, CPRR, Carleton E. Watkins, Alfred A. Hart, Donner Party, Summit Valley, Donner Pass, Bloomer Cut, Palisades, Steam Locomotive, Wood Burner, Sierra Nevada Mountains, Stereoviews, Western Americana, 1870s Photography]