Handwritten letters of which 12 were replies to a questionnaire sent out by Smith from the South African Museum asking for information on the habits of the tiger wolf. A printed copy in Dutch of this questionnaire together with the answers completed in handwriting on the opposite page, also in Dutch. The questionnaire was published in the Cape Town Gazette and African Advertiser of 9 June 1826. Appeals were made in this newspaper by Smith during 1826 for zoological information and the other letters are mainly in response to them. Correspondents included Dr. J. Atherstone, D. Campbell, Edward and Thomas Philipps and George Rex.

2 other letters of later date (1) 21 Jul. 1838, from T.E. cantor, on the classification of reptiles; (2) 13 Mar. 1850, Newera Ellin, from E. Kelaart, also on reptiles and enclosing a water-color drawing of a frog. Notes on the natural history of South Africa, some of which were compiled by Smith.