Much of the material in this collection was collected by the University Librarian and historian John C. French. His collection of papers, MS.0070, contains much of his research and writings on Johns Hopkins based on the material in MS.0078. An interesting reminiscence on Johns Hopkins and his philanthropy is John Work Garrett's speech to the Baltimore Y.M.C.A. on its thirtieth anniversary in 1883. A photostatic copy of this speech is in MS.0137, series 1.
Johns Hopkins hired the firm of McGill and Woodward to collect money owed to his firm Hopkins Bros. and Co. Invoices and receipts for Hopkins Bros. are part of the McGill Papers in MS.0043.
For family papers related to descendants of Hannah Janney, mother of Johns Hopkins, see the Janney family papers, MS.0572.