I included a link to Richard Rutt's collection of Victorian knitting manuals at the University of Southampton Library in my book. Sadly, pretty much right around the time that I published, they changed the way the collection was organized, which made it way less user-friendly!
They're now on Archive.org, and it's a pretty awesome resource! Go forth and marvel at how far we have come, but also remember that a lot of this wonderful knowledge has been "unfairly forgotten," as Barbara Walker said about at least one of the knitting stitches in her extensive collections. Or was it, "unjustly forgotten?" I really must read through those again, some day.