Here are two pairs of moccasins I made a while back. Both are a early to mid 19th century Missouri River style interpretation.
Both are made of brain tanned hide and beaded using sinew and pony beads. The Quillwork technique is "Quill Wrapped Horse Hair", in which the quills are wrapped around a bundle of horse hair and stitched to the hide. It was a rather rare technique even back in its heyday. The technique was all but extinct until recently revived.