Quote Originally Posted by usonian View Post
When I was learning to weave, my University's library had a copy of Harriett Douglas' monograph and I used it to weave my first tartan. I assumed for many years that designating setts in terms of blocks was normal.
No, as I presume you've now discovered. It's a technique that, I think, belongs to the overshot type of decorated weave. It's completely unnecessary for tartan.

I believe Douglas was her maiden name - she wrote a good many books on various weaving-related subjects as 'Harriet Douglas Tidball'.
Ah, I know of her by her maiden name - thanks.