An interesting exemplar of Erasmus’ De conscribendis epistolis (Strasbourg, 1529) is available in Full View over Google Book Search:
http://books.google.com/books?id=ggA8AAAAcAAJ
Check out doodles in the margins!
Neven Jovanovic
Zagreb, Hrvatska / Croatia
http://www.phil-hum-ren.uni-muenchen.de/W4RF/YaBB.pl?num=1288427511/0#0