Envelope of early scientific papers (before 1900); letter to Nature 14 Aug 1933 "Sponges without collar cells"; "Russian scandal" in design, done by fellow travellers on an Orient boat from Naples to London c. May 1893 (sketches of prehistoric animal); obituary of W.H. Caldwell (envelope of notes, proofs etc.); obituary of E.J. Allen (envelope of notes, proofs and letters); envelope of miscellaneous papers and letters; first draft of a final paper on the jet of the sponge; envelope of "Notes and MSS" (part of dissertation?); papers by E.Topsent sent to Dr Bidder (folder); Granules (env. of notes and typescripts); two cardboard envelopes: "Original drawings, sponge cells"