(Military Courier) Fort Whipple, Prescott, A.T., regiment address on 1864, 3¢ pink entire with manuscript "Per Steamer" routing endorsement at top, ca. 1865 usage believed from Fort Yuma up the Colorado River by flat bottom steamer to Fort Mohave then by buckboard to Whipple, Very Fine, carried entirely outside the mails by military supply route, accompanied by J.L. Meyer article regarding this cover. Estimate  $500 - 750. $0 (Image)