Diagonal tile (pattern)
Start with a diagonal stitch over one intersection of the fabric, from bottom left to top right.
Count across right one and up four threads, bring the needle up and connect to the previous stitch.
Bring the needle up again at the beginning of the first stitch and complete a diagonal stitch over one intersection. The stitch should lie top left to bottom right.
Count down four threads and left one thread, bring the needle up and connect to the previous stitch.
Complete the small diamond with two small diagonal stitches, each over one intersection.
Working horizontally across the area, repeat the last five steps to create the diagonal tile pattern.
Structure of stitch
Various Authors, The Royal School of Needlework Book of Embroidery (2018) , p.150
Becky Hogg, RSN Essential Stitch Guides: Blackwork (2010) , p.57