1. Map of the Cheyenne and Arapahoe Indian Reservation, Oklahoma Territory showing lands to be opened for settlement on April 19, 1892, under proclamation of the president. [cartographic material] Yale Public content 1892. 2010-02-18T19:53:58Z. 2016-09-28T13:16:38Z. United States. Department of the Interior. Dept. of the Interior. English. Public. Cheyenne and Arapaho Reservation (Okla.) and Oklahoma.