Notes and Documents column including William D. Welge's "The Collection of Theodore H. Barrett, Surveyor of Indian Territory, 1870-73" which highlights the acquisition of The Theodore H. Barrett Collection, 1870-1879, by the Oklahoma Historical Society. It also includes Dianna Everett's "The Encyclopedia of Oklahoma History and Culture released by Oklahoma Historical Society in January 2010" which celebrates the Oklahoma Historical Society's release of The Encyclopedia of Oklahoma History and Culture in 2010.