Indian Territory is a wild shot. If I were guessing I'd start with the Chickasaw and Choctaw Nation. Each of the "Five Civilized Tribes" had National governments and each had slaves before the Civil War. To replace the slaves they had day laborers and tenant farmers. They had to have work permits to enter those lands or they were squatters. Because your relatives went back to TX, it is likely that they would have just crossed the Red River to farm the very rich land there. Hotels were built, doctors and lawyers set up practices in towns along the railroads, etc., but no one owned any of the land. The land rights were retained by the National governments. Oklahoma Historical Society Library has microfilm of those records and the combined Five Civilized Tribes' Archival records are in some cases retained in Muskogee. Arkansas was the headquarters of federal records and court dealings during the period before Oklahoma became a state in 1907. I never did find my grandfather's work permit or the record of his brothers' or his uncles' tenant farmer status, but you might get lucky! ---ila41430@aol.com