The first sample in this set shows the same zigzag, two zigzags crossing each other, and a third column of zigzags offset.
I also took the embossed paper sample 4:4:18 and interpreted its markings (something like runes) in two types of thread:withdrawn and self dyed fine thread.
Both these experiments use stitching across the bars for the diagonal markings and buttonhole for the horizontal marks. Looking at these two images I feel the one using withdrawn threads is most successful. The marks seem more intended yet still subtle, which is probably attributable to the thread being variegated and its crisp nature.