Contains over 350 letters by Davidson, most of which are addressed to Grant Richards, his friend and publisher. There are nine autograph manuscripts in the collection, including The Testament of John Davidson (London, G. Richards, 1908) and Fleet Street and Other Poems (London: G. Richards, 1909). Also included is a folder of reports prepared by Davidson for Grant Richards, in which the author gives his assessment of materials under consideration for publication. There are a substantial number of letters written by Mrs. Davidson to Richards concerning her husband's disappearance and subsequent suicide in 1909. Other items include galley proofs with Davidson's holograph corrections, documents, and clippings pertaining to his literary career.