Illustrations of the "scalp belt" in CADDIE WOODLAWN

On Images of Indians in Children's Books, I've posted scans of the illustrations of the "scalp belt" in Caddie Woodlawn. There are two sets of scans. One from the earlier edition with Seredy's illustrations and one set from the later edition, with illustrations by Trina Schart Hyman.

I have yet to substantiate--to my satisfaction--the existence of a "scalp belt" as an artifact actually made or used by Native people. It does appear in fiction by non-Native people, such as Zane Grey. I'm still looking, though, so I do welcome your leads.

A special request to librarians:

Can you tell me how many copies of the book you have in your library? And, can you give me any details as to its circulation in the last year or years?