Hexagonal lozenge (pattern)
Complete a row of vertical stitches over four threads of the fabric, each two fabric threads apart.
Continue with any subsequent rows needed to fill the area, each row should also be two fabric threads apart. Add each stitch in line with the previous row.
Then stitch a zig zag pattern between each row with the apex of the zig zag meeting alternate vertical stitches.
Structure of stitch
Various Authors, The Royal School of Needlework Book of Embroidery (2018) , p.140