This book, I am sure is of great interest to many people whom have traced their ancestry all the way back to Diego de Montemayor. I highly recommend that if you have traced your ancestors to Northern Mexico or South Texas make sure and look for them in this book.
With this book I was able to link several lines to the same ancestor. I highly recommend you take a look at it if possible. It also contains several copies to original images, but it is mainly about 140 pages of names of one huge family tree.
The author of this great work is Guillermo Garmendia Leal and he compiled it in Monterrey Nuevo Leon back in 1993.
As with most books that I mention in this blog, this one is available at the University of Texas Pan American and you can see if it is available in their catalog. If you live in any other part of the U.S.A. and want to see if a local library has it just check Worldcat.