I hope you can get this link. http://hartcottagequilts.com/railroad.htm
It is an interesting story about quilts from the South made by slaves. One
descendant claimed the quilts were codes to help slaves escaping northward via
the Underground Railroad. However since this was first publicized, the
author has recanted the story. Many elementary art teachers used this story to
get students interested in history. Oh we've got some splaning to do!
Nevertheless it is an interesting update on what was going on back then. And a good
lesson for students to double check sources.