This textile can be found in the Ashmolean Museum, Accession number EA 1984.564.
It is a ground cloth of tabby woven linen, embroidered with red and blue silk in a double running stitch. It is 26.5 cm by 7.5 cm, with a rolled and whipped stitch hem in silk. On the far right of the textile looks to be a pattern darned section, but there is not enough of the design left to see.
I have charted up the design in a pdf format-
I usually ask everyone who reads this blog to try out the pattern themselves here, but this time I have tried it myself & have pictures to show off! There is a very obvious mistake, left in the middle.
The pattern was embroidered onto a handkerchief that was given to King Niall III and Queen Sabine I, at the William Marshal Memorial Tourney in Stormhold.