Historic Samplers by Pat Ryan and Allan Bragdon
This book came out in 1992 and is out of print. One of the authors (Pat Ryan) is part owner of R&R Reproductions (you may even have some of the fabric she dyes in your stash!) This book is hardcover and 160 pages of sampler history, information and charts for some of the samplers in the book. A lovely addition to anyone's stitchy library.