Sorry to hear Macleay has been "attacked by my old enemy in the lungs", warns him to be careful in the severe weather, which is much like that which made him so ill in 1812. Will soon send a paper on "fishes from America" [by Samuel Latham Mitchill] for Linnean Society meeting. Requests Macleay's servant to deliver two letters to Fludyer Street, [London, home of George D'Oyly].