I recently came into possession of a 1948 edition of Mary Thomas's Knitting Book. I must admit that I've been aware of this book for quite awhile and have not been all that interested in it. Dover reissued the book in 1972 and as far as I can tell it has been in print ever since. My sole objection to it was that it didn't have any actual garment patterns that I could day dream over.
The cover of the reissue boasts that it features 248 illustrations and this is true - there are 248 illustrations diagraming how to do things like turn a heel or sew a seam. What it doesn't mention is all the other absolutely charming illustrations by Margaret Agutter. When I came across this book at one of my local used bookshops, I think it was those little drawings that convinced me to buy it (that and a price tag of £1.50).
I'm afraid I may have gotten a little carried away photographing them for you . . .