Since I began this project, I've learned that the weft was often woven differently from the warp; the warp would be worsted, but the weft would be woolen; the inclusion of woolen would cause the fabric to be warmer and to full up tighter. Further, the warp would have a reverse twist from the weft; I imagine that this also helped it full up tighter.
I have plentiful white (and some black) fuzz from combing the locks for my worsted. So, I have now decided to try to make this a rock and wheel tartan; spinning the long fibers into worsted and the shorter ones into woolen; wasting nothing and incorporating the advantages of both kinds of yarn.
Right now I'm spinning Black Hebridian worsted on my antique wheel and woolen on my Ashford; different spin and different technique for the different fiber.
Wish me luck . . .
(Cross-posted to handspinning and my own blog.)