First thing I realized was the lack of tutorials and photos of this stitch online. I found this video tutorial that is good, but also a bit blurry and this photo on Flickr. Both were helpful and gave me a good starting point on how to stitch it.
I read on a few websites about Mountmellick embroidery that the thorn stitch is basically a feather stitch with a French knot on every other stitch.
Honestly, I had a hard time with this stitch and these photos are my best example after many, many tries. I have no problem with feather stitch - but adding the French knot I found difficult for some reason! I do think it was easier to stitch with the pearl cotton than when I used regular floss.
I know this isn’t exactly how to stitch the Mountmellick thorn stitch - it definitely looks different from the few examples I found online - but that's ok. It’s my version of it. :)
This time for my whitework project, I decided to stitch a little sampler. I switched fabric because I really like how the white floss looks on the linen.
Interested in reading more about Mountmellick Embroidery? One great website I found is Vetty Creations. Yvette Stanton's embroidery is amazing. I started following her awesome board on Pinterest and I think I will be purchasing her book on Mountmellick embroidery also.