I have just purchased The History of The Ancient Ryedales - (two volumes), by G.T. Ridlon. This an excellent resource for not only the Ridlon descendants, also family surnames of Riddell, Riddle, Ridley. etc. Fully illustrated with engravings of portraits, residences, monuments, coat-of-arms, and autographs. It was published by G.T. Ridlon in 1884. Unfortunately, it is in the rare and out-of-circulation books.. My edition was published by Tuttle Antiquarian Books, 28 South Main St., Rutland, VT 05701. Telephone (802) 773-8229. I ordered through Barnes & Nobles, but in the future I'll order through Tuttle direct.