| Alexander Gardner "Westward The Course of Empire Takes Its Way": Laying Track 600 Miles West of St. Louis, Missouri [Across the Continent on the Union Pacific Railway, E.D.] 1867, 19 October Albumen silver print 33.2 x 47.6 cm (13 1/16 x 18 3/4 ins) J. Paul Getty Museum Object Number: 84.XM.1027.37 LL/51564
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