Notes and Documents column including an article honoring the individuals who were inducted into the annual Oklahoma Historians Hall of Fame in 2006. The honorees in April 2006 were Joe C. Jackson, Denzil D. Garrison, Alice Tyner Timmons, and Robert "Bob" F. Read, Sr.

Notes and Documents column including William D. Welge's "The Andrew J. Reynolds Collection, 1880–1888," which highlights the donation of ledger volumes of the records of A. J. Reynolds, an Indian trader of Anadarko, Indian Territory. It also includes Jim Gabbert's "Chilocco Indian Agricultural School, A National Register Historic District," which celebrates the inclusion of the Chilocco Indian Agricultural School to the National Register of Historic Places.

Notes and Documents column including an article highlighting the John William Kirschner Collection held by the Oklahoma Historical Society. The bulk of the collection consists of fire insurance rating booklets published by the Oklahoma Inspection Bureau and also includes maps from the Sanborn Fire Insurance Map Company. This collection is best suited for researching historical buildings in Oklahoma.

Notes and Documents column including a short document describing the history and contents of the Oklahoma City Chamber of Commerce Collection that was donated to the Oklahoma Historical Society in 1994. It also includes a short description of the Henry and Cunningham Mercantile Company Collection manuscripts located in the Research Division of the Oklahoma Historical Society.