I ran across two monographs from the late 1940's on tartans and weaving in the digitized collection of the University of Arizona which may be of interest to some.

The first is titled "The Sett and Weaving of Tartans". The opening background remarks contain several inaccuracies about the origin and development of tartans, but I found it to be interesting nonetheless.

The second titled "Scotch Tartan Setts" contains thread counts and instructions for weaving 132 different "traditional clan tartans".