Tied pavilion stitch
Make the tied central stitch of the diamond first. This is a long vertical stitch across eight canvas threads,
With this in place, start to fill in the diamond shape with two vertical stitches, each over six threads, to either side of the tied central stitch.
Structure of stitch
This is a large flat stitch that covers the canvas quickly.
Various Authors, The Royal School of Needlework Book of Embroidery (2018) , p.118