- Hope Entomological Library, Oxford University Museum of Natural History: ARW 77 [enclosure]
- Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [p. 316]
Mentions Dr Krefft and discusses a caterpillar in Sydney whose cocoon imitated the leaf to which it was attached.