THE SECRET OF THE PACIFIC: A DISCUSSION OF THE ORIGIN OF THE EARLY CIVILISATIONS OF AMERICA, THE TOLTECS, AZTECS, MAYAS, INCAS, AND THEIR PREDECESSORS; AND OF THE POSSIBILITIES OF ASIATIC INFLUENCE THEREON C. REGINALD ENOCK 1912
MEXICAN AND CENTRAL AMERICAN ANTIQUITIES, CALENDAR SYSTEMS, AND HISTORY, GERMAN PAPERS TRANSLATED CHARLES P. BOWDITCH 1904
AN OUTLINE DICTIONARY OF MAYA GLYPHS; WITH A CONCORDANCE AND ANALYSIS OF THEIR RELATIONSHIPS WILLIAM GATES 1931