XJF105343 A Station in the Prairie: The 100th Meridian (engraving) (b/w photo) by American School, (19th century); Private Collection; (add.info.: October 6 1866 Casement and his crews pass the 100th Meridian line on the prairies of Nebraska, thus guaranteeing the Union Pacific the irrevocable right to continue westward, as stipulated in the Pacific Railroad Act; Durant throws a grand "100th Meridian Excursion" for dignified guests, featuring a mock Pawnee ambush; 247 miles from Omaha;); American, out of copyright.