- Hope Entomological Library, Oxford University Museum of Natural History: ARW 20
- Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 2. London & New York: Cassell & Co. [p. 218]
If DCL gets offered again, will accept. "I feel myself too much of an amateur in Nat. His, and altogether too ignorant ... to receive honours from a great University .. . left school (a bad one) at 14." About Mr. Edwards and his butterfly collection. Criticises Bates' classification of butterflies.