I was rooting around a site called Vintage Knitting this morning, and the woman's blog was talking about looking through the Library of Congress' older books in search of vintage knitting patterns, but she came across some neat sites herself:
- Illuminated Books. There are scans of a bunch of illuminated manuscripts and books. Sooo gorgeous!
- Project Gutenberg. There are loads of free older books available for download here.
Project Gutenberg even has knitting books, like this one, "Beeton's Book of Needlework".