silkey

I also saw several parsels of buffaloe's hair hanging on the rose bushes, which had been bleached by exposure to the weather and became perfectly white. it every appearance of the wool of the sheep, tho much finer and more silkey and soft.

The Journals of Lewis and Clark, 1804-1806 Meriwether Lewis 1791

Ed. Page view page image: covered with short fine hair. they are of a uniform colour, a redish brown; tho 'the base of the long hairs, which exceed the fur but little in length, as well as the fur itself is of a dark colour for at least two thirds of it's length next to the skin. the fur and hair are very fine, short, thickly set and silkey. the ends of the fur and tips of the hair being of the redish brown that colour predominates in the ordinary appearance of the animal.

Original journals of the Lewis and Clark Expedition, 1804-1806 1904