The New England Quilt Museum (Lowell, MA) has a lending library and encourage calls, etc. as well. They might be interested in researching this block and may come up with some historical info on it other than or to affirm what's already been shown. It's a great, but little known resource. All contact info, etc. is shown at:
http://www.nequiltmuseum.org/museum/...resources.html
~Jo