1Thomas Jefferson to Isaac Riley, 7 October 1809 (Jefferson Papers)
I have duly recieved your favor of Sep. 29. proposing to publish a new edition of the Notes on Virginia , and asking for such additions as I might wish to make. I have long intended to prepare an enlarged edition of that work; with such additions & corrections as information & experience might enable me to make: and I have been laying by materials from time to time, as they occurred, for that...