Steamer Black Hills, Yankton, Dakota (Territory, now South Dakota). Printed corner card on legal size cover carried outside of the mails, with a large vignette of a Missouri River Transportation Company (Coulson Line) side-wheeler underway, dateable to between 1877 when the P.S. Black Hills was built and 1884 when the riverboat was crushed by ice, corner nick at upper left affecting the corner card, edge wear, small tears and toning, Fine. Estimate  $100 - 150. $0 (Image)