Whitework: interlacing stitch tutorial (basic stitch, horizontal line)

I was trying to work out a chart for interlacing stitch myself, when I found this wonderful step-by-step tutorial by Linda Fontenot:

Interlacing stitch tutorial

This stitch was used to embroider borders in 14th century whitework. Some examples are the borders of the Feldbach tablecloth and the borders of a "Chase of the unicorn" wallhanging. For pictures, see these books:

Pesel, L. , Newberry, N. (1921), A book of old embroidery, with articles by A. F. Kendrick. London: Geoffrey Holme, “The Studio”, plate 58

Schuette, M., Müller-Christensen. S. (1963), Das Stickereiwerk, Tübingen: Wasmuth

Now I can start with the next part of my sampler :-)