Georges-Louis Leclerc, comte de BUFFON (1707-1788). L.S., Jardin du Roi January 23, 1786; 1page in-4. He assures us that he has sent his correspondent's patent, and is "convinced that you will continue to give me marks of your friendship and zeal. I will set aside the notes you would like to send me on birds, some species of which are indeed not very distinct because those of different ages and sexes have often been confused"...