- British Library, The: BL Add. 46434 ff. 36-37
- Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [pp. 151-152]
Contains personal comments about his own state of ill-health. A brief reference is made to Melastomas. A brief reference to a grand paper being given by ARW.