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Promontory Summit, site of the Golden Spike and the completion of the TransContinental Railroad, May 10, 1869, zoomable image

Cropped, sized, and prepared for use here by John Osborne, Dickinson College, November 13, 2017.
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Source citation: 

John Osborne, Dickinson College, Carlisle, Pennsylvania, private collection.

Source note: 
Photographer: John Osborne, September 17, 2016.