A stretch of country in the basin of the Arkansas, Canadian, and Red Rivers, with Kansas on the N., Arkansas on the E., Oklahoma Territory on the W., and separated by the Red River from Texas on the S., set apart for the occupation of the Indian tribes of the western prairies; formerly double its present size, it has been reduced by the purchase in 1890 of Oklahoma.; in the centre and east are fertile plains and great forests of walnut and maple, in which deer and bears abound; the west is a treeless prairie supporting vast herds of cattle; mineral resources are probably rich, but are undeveloped; the principal tribes have their own organisations and civilised institutions, churches, schools, banks, and newspapers; the towns are small, Tahlequah, Lehigh, and M'Alister are the chief.