What the square, the compass and the apron are held to mean, set out by the man who wrote the standard American lexicon of the craft. Mackey was a physician who gave up medicine for masonic scholarship and remains the authority most often cited by the lodges themselves. This edition is bound with a gallery of 60 plates of painting, among them works by Panini, Turner and Franciabigio, and includes five illustrations restored and coloured for this edition.