Thanks Smith for revising his paper on 'Bertolonia'. Hopes Smith has received the other papers he sent on two new species of lobster; a new species of 'Echensis'; and a new species of tuber. Observes that "a sort of fatality" seems attached to [Franciscus] Cupani's "Panphyton Siculum", with Cupani, Bonanni and Chianelli, and now himself failing to finish their work on it; asks for Smith's assistance in getting it published in London. Asks whether any English publishers would take up three of his manuscripts: "Flora Sicula", "Sicilian Zoology", and "Critiques des Genres". List of nine botanical works he would like Smith to acquire for him.

Sending his "Monography of the genus Callitriche" in addition to the "Description of a new species of Echeneis" sent with his last letter. Asks to be informed of recent botanical and zoological developments in England and Europe, including the publications of [Christiaan Hendrik] Persoon and [Carl Ludwig] Willdenow, "Hortus Kewensis", and Smith's "Flora Britannica" and "Flora Graeca". Details of his own intended publications "General generic criticism; or alphabetical criticism of all the generic names of botany & zoology" and "Order of plants". Impossibility of publishing in Sicily.