Singalese Chain Stitch

An Open Chain Stitch variation that is worked over two parallel laid threads of a contrasting color. Bring the laid threads through from the back and let them lie loosely along lines to be stitched. Begin by bringing the contrasting thread through just below and inside where the left laid thread emerged.

A Crewel Embroidery Primer, p 35 Mary Thomas's Dictionary of Embroidery Stitches p 40