The Sunlight book of knitting and crocheting (1915)
Gray, Adelaide J., [from old catalog] ed · Chicago, W.G. Perry · leaf 11
Make a chain of loops, pulling out 1 loop through the other. SLIP STITCH … Place the hook in a loop on the chain, put yarn over hook and pull through both loopson needle at once. SINGLE CROCHET
Knitting · Crocheting
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.