Yes, I've noticed. I know more about tartan in general than about the uniforms of the various Scottish regiments, but I'm beginning to learn more. I have one military history book on uniforms of the First World War; the rest are mostly about aircraft.

Regarding the drawing you mentioned, do you know if it's based on a photograph (or photographs)?

And, to make a totally transparent effort to refer back to the topic of the original post, I wonder if the Marton Mills Buccleuch tartan would make a nice camouflage tartan—maybe if it didn't have that white stripe? Some years back I designed a "camouflage" tartan I called "Polygon Wood". It was essentially the same as the Brown Watch, of which I was unaware at the time.