HAMMONDS OF HULL - WOOLS, WITH INSTRUCTIONS FOR RUG-MAKING
Hammonds of Hull, a large department store, produced this very comprehensive book about rug-making. It covered a number of different methods including latch-hooking. It's worth visiting the full size images of 2-page spreads on Flickr (which also include adverts for knitting and crochet wool).
See Flickr where images and patterns can be downloaded at full resolution for your own use.
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