Jan, I too appreciate your knowledge. And I agree that Mary Ellen Hopkins was a gem of a teacher. I have the first edition of her book "It's OK to Sit on My Quilt" and I learned so, so much from it. I don't see things as well as you do, but I am able to figure out many blocks by examining them. That's what I find so fascinating about quilting. I end up examining patterns much more than I do any actual sewing!