The Gettysburg Sunday School Missionary Society of the Methodist Episcopal Church first convened on April 8, 1847, in Gettysburg, Pennsylvania, and met regularly until at least mid-1877. In the intervening years, members founded numerous auxiliary societies. The Gettysburg Sunday School Missionary Society was affiliated with the Central Pennsylvania Conference of the Methodist Episcopal Church.
From the guide to the Missionary Society of Gettysburg minutes, 1865-1877, (William L. Clements Library, University of Michigan)