Classification of sponges (folder of rough notes); notes on "Climatal phenomena of viscosity" 1923, and letter from H. Munro Fox 1936 (envelope); crystalline structure in sponges and formation of calcareous spicules (pocket file); address to BAAS 1927 "Ancient history of sponges and other animals"; G.P.Bidder's consideration of "Parker's reaction of sponges to temperature" (envelope); illustrations for paper on sponge jet and proofs of "Form of a sponge"; typescripts of published papers, with added comments and notes; exchange of letters with Bogaslaw Dohrn of Naples, Jan 1921 (envelope); paper given at Leicester 1933 (rough diagrams in folder); handwritten drafts of "Collar cells", "Carmine", "Types of canal system", "Ectoderm of calcarea" (pocket file); two files of papers "showing personal interests"