chain stitch in a chequering of two colours
Grace Christie (Mrs. Archibald H. Christie)
1912
<a rel="nofollow" class="external text" href="https://www.gutenberg.org/ebooks/20386"><i>The Project Gutenberg eBook, Embroidery and Tapestry Weaving, by Grace Christie</i></a>, available freely at <a href="https://en.wikipedia.org/wiki/Project_Gutenberg" class="extiw" title="w:Project Gutenberg">Project Gutenberg</a>