- Natural History Museum, London: NHM WP1/3/41
- Natural History Museum, London: NHM WP1/3/72
- Natural History Museum, London: NHM Catkey-418384
- Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [pp. 65-68]
- Wallace, A. R. (1908). In: My Life: a Record of Events and Opinions (2nd edition). London: Chapman & Hall. [pp. 184-185]
Receipt of mail from home including letters from Bates and Darwin; cleaning and packing of collections from Aru; detailed account of numbers, types and locations of insects collected, including first serious collection of very small beetle species (Staphylinidae etc) at Macassar; comparison of data sent by Bates with his own; reaction to ARW's paper "On the succession of species", approving letter from Darwin; benefit of Darwin's proposed publication on species and varieties; boundary between two distinct faunas in Malay Archipelago; proposed expeditions to Gilolo island [Halmahera] and New Guinea; advantages of Amboyna as a base; battles of Balaclava and Inkerman; Britain - India meeting [British rule in India]; insects in the Andes.