Internet Archive staff were tooling around looking for books with marginalia, and we chanced upon some cool things. A trio, pretty much at random - each a delightful challenge for presentation. Enjoy.

A copy of the Encyclopedie (the old one) from John Adams' library -
http://www.archive.org/stream/encyclopdieoud01soci#page/n19/mode/2up

Excursion to Scotland (the ultimate in marginalia)
http://www.archive.org/stream/excursiontoscotl00anonuoft#page/n7/mode/2up

The boke of Saint Albans (1486, reprinted 1901)
http://www.archive.org/stream/bokeofsaintalban00bernuoft#page/n3/mode/2up