Received Smith's letter of 19 September 1788. Thanks for book by Mr Ellis and one of Smith's Latin dissertations. Shall send copies of his dissertation on the propagation of fish in which he discusses two hermaphrodite fish, 'Perca' and 'Canna'. Is following this publication with one on propagation of cartilaginous fish and one on propagation of crabs, asks whether it is preferred for them to be written in Latin or Italian. Admires Smith's own work on the propagation of the species and his notes on Linnaeus. Not convinced by [Johann] Hedwig's arguments.