- Natural History Museum, London: NHM WP1/3/28
- Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [pp. 47-48]
Arrival in Singapore; town and population; Bukit Tima (Timah) Mission; butterflies; boxes due on ship Eliza Thornton; broken watch; instructions to Samuel Stevens.