Series IV, “Book and periodical contributions by members of the Mitchell family, 1839-1840, 1992,” contains published and printed works authored by members of the Mitchell family. Included in this series are three items; “Oh! Fly to the Prarie” and “The Prarie Lea,” music composed by John Kearsley Mitchell, and a written appreciation of Samuel Lewis, MD, published by the College of Physicians of Philadelphia and including remarks by Silas Weir Mitchell. This series is arranged alphabetically by author. [Items by J.K. Mitchell missing.]