ETCHING, ENGRAVING.) BIBLIOGRAPHY.-W. P. Robins, Etching Craft (1922), pp. 163 seq.; Bibliography.-W. P. Robins, Etching Craft (1922), pp. 163 seq.; E. S. Lumsden, The Art of Etching (1925), pp. 1$, 46, 127 seq.
(Mu. B.)
