Samuel M. Janney was a well known minister of the Society of Friends in Loudoun County, Virginia. He was a biographer of George Fox and William Penn and author of a "History of the Religious Society of Friends from its rise to the year 1828." Further information about this individual or organization may be available in the Special Collections Research Center Wiki: http://scrc.swem.wm.edu/wiki/index.php/Samuel M. Janney.
April 30, 1880 obituary from Mss. Acc. 2008.336 Samuel M. Janney Collection.