Knitting and crochet. A guide to the use of the needle and the hook .. (1885)
Croly, Jane (Cunningham), Mrs., 1829-1902, [from old catalog] ed · New York, A. L. Burt · leaf 113
row. — One triple treble under the chain in the depth of scallop, three chain, one double treble through the next two loops of hair-pin work together, thiee chain, one treble through two next loops together, three chain, one treble through two next loops together, three chain, one double treble… … the stitch after it.
Knitting · Crocheting
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.