Click on image above to enlarge

Avalon, Arthur (Editor) Principles of Tantra. The Tantratattva of Sriyukta Siva Candra Vidyarnava Bhattacaryya Mahodaya. Edited, with an Introduction and Commentary by Arthur Avalon. London 1914-16
First edition Two volumes, pp.lxxxi, 400, xxxii, cxlix, 417. A very good set of the first edition bound in contemporary cloth.