I agree with Two Steps, and I often wear them myself. Mine are fringed - not like those that would have come strait out of Taos, but more like a trappers squaw would have made.
From the four Sketchbooks that I have which cover that era:
- In The Image of A.J. Miller - no mention
- The 1837 Sketchbook of the Western Fur Trade - no mention
- A Shining Time Vol. 1 The Fur Trade - 2 examples of blanket knee high leggings (basically wool botas)
- Mountain Man Sketchbook vol 1 - one example of highly decorated Taos botas