Article chronicles the establishment of Fort Arbuckle, a military post built to protect the Choctaw Nation from the Chickasaw Nation and to protect emigrants on their way to California.

Notes and Documents column including an appendix composed of an 1870 report on the quality of natural resources, people, and properties found within Indian Territory; an announcement of the creation of the National Board of Geographic Names; the minutes of the annual meeting of the Oklahoma Historical Society held on February 1, 1927; and, the minutes of the meeting of the Board of Directors of the Oklahoma Historical Society held on the same day.

Article is a list of post offices located within Oklahoma and Indian Territory during the 19th century.

Notes and Documents column including a report made to the Board of Directors of the Historical Society regarding members of the Five Civilized Tribes who fought with the Confederate Army and an index for the volume.

Article details the establishment of the Choctaw Academy, a mission school that served young Choctaw boys, through correspondence written between faculty and staff.

Notes and Documents column including a proposed amendment for the Oklahoma Historical Society's constitution, the minutes of the meeting of the Board of Directors of the Oklahoma Historical Society held on May 1, 1928, and a list of members of the society.

Article contains journal entries from the Indian agent Douglas Cooper regarding discussing on how best to protect the Choctaw and Chickasaw tribes under his protect from invading Comanches.