Jefferson -- Jefferson the natural historian, the Jefferson of "Notes on the State of Virginia" -- has a great deal to teach us about the Internet. And the Internet -- how it works, how it is organized, and the reasons why it has flourished -- can, in turn, help illuminate many of Jefferson's ideas. That, at least, is the premise of my book, and in this talk I'll try to sketch out some of the things I learned about the Net by studying Jefferson and some of the things I learned about Jefferson by studying the Net.