JOYCE, T. A. Mexican archæology. An introduction to the archæology of the Mexican and Mayan civilizations of pre-Spanish America. New York and London. In pl. I is reproduced in colors the skull mask, and in pl. XVIII, fig. 1, the knife with handle. Reference to these is made on p. 141. HOLMES, W. H. Masterpieces of aboriginal American art. II. Mosaic work, minor examples. _Art and Archæology_, vol. I, no. 3, Washington, November. A description (pp. 91-102) of some of the more important specimens of mosaics, with colored frontispiece and 9 figures. 1915 POGUE, JOSEPH E. The turquoise. A study of its history, mineralogy, geology, ethnology, archæology, mythology, folklore, and technology. _Memoirs of the National Academy of Sciences_, vol. XII, part II, third memoir, Washington. Mexican mosaics are described on pp. 93-97; fig. 4 illustrates the bird mask in Gotha; pl. 15-17, Mexican mosaics in the British Museum and in Rome (10 pieces). The Use of Turquois in Mexico and Central America: Use as Attested by Historical Evidence, pp. 90-92; Use as Attested by Objects, pp. 93-97. 1921 ARREOLA, JOSÉ MARÍA. Como legítima el Museo Nacional ha adquirido una pieza falsificada. _El Excelsior_, Mexico, Oct. 20. Illustrates in this signed newspaper article a stone mask with turquois mosaic decoration said to have been found in Guerrero. He concludes that it is fraudulent. LEHMANN, WALTER. Altmexikanische Kunstgeschichte ein Entwurf in Umrissen. Band 8 des Orbis Pictus. Weltkunst-Bücherei herausgegeben von Paul Westheim. Berlin. In this short study of old Mexican art history Dr. Lehmann illustrates a number of notable Mexican antiquities. The Xolotl figure in Vienna is illustrated, front and side views, pl. 7, and the crouching animal figure in the British Museum is given on pl. 8. He gives brief descriptions in the description of plates on pp. 22-23. 1922 GAMIO, MANUEL. Una máscara de mosaico falsificada. [A counterfeit mosaic mask.] _Ethnos_, tomo I, núms. 8-12, pp. 260-264, Mexico, Nov. 1920-Mar. 1921. Gamio denounces as fraudulent the stone mosaic mask claimed to have been discovered in Guerrero by Porfirio Aguirre. MENA, RAMON. La arqueología debe de estar en manos de arqueológicos. _El Universal_, Mexico, April 2. In this signed newspaper article Mena defends the authenticity of the stone mask decorated with turquois mosaic, said to have been found in Guerrero. Transcriber’s Notes: Italics are shown thus: _sloping_. Small capitals have been capitalised. Variations in spelling and hyphenation are retained. Punctuation has been retained as published.