The Treasury of Ornament - Heinrich Dolmetsch 1898
This book, first published in English in 1898, is one of the great 19th century studies in pattern and design. This is a superbly illustrated edition, the first to be published in English since 1912. The very extensive plates are accompanied by a detailed text and the volume is encyclopaedic in scope from Ancient Egyptian and Grecian Art to 17th and 18th century Baroque and rococo motifs.
wikipedia - Ornament