Overview: The Isaac Newton Kerlin papers, 1838-1970 (inclusive), 1838-1891 (bulk) consist of correspondence, notes, photographs, reports, and publications produced and collected by Isaac Newton Kerlin as Superintendent of the Pennsylvania Training School for Feeble-Minded Children in Elwyn from 1863 to 1893. A letter from 1970 contains a request from the owners of the Elwyn Institute for the donation of Kerlin's papers.