Make a vertical stitch across four threads of canvas, but do not pull it too tight.
Bring the needle up to the left of the stitch, two threads down and one across. Make a horizontal stitch across one thread of the canvas, anchoring the long stitch to the left.
Make a second vertical stitch in the same holes as the first. This time make a small stitch anchoring it to the right.
Work a row of these stitches, beginning the stitch two canvas threads across each time. For the second row, begin the vertical in the same canvas hole as the small horizontal stitches of the row above.
Structure of stitch
Identifying French stitch
This stitch is worked across four threads of canvas by two.
Mary Thomas, Mary Thomas’s Dictionary of Embroidery Stitches (1934) , p.105
Various Authors, The Royal School of Needlework Book of Embroidery (2018) , p.109