¹ In preparing this definition various secondary sources of information were consulted: a number of dictionaries, a few botanical works like G. B. Sudworth's Nomenclature of the Arborescent Flora of the United States, A. Koehler's Identification of True Mahogany . . ., and Sudworth and Mell's Colombian Mahogany; also encyclopaedia articles. My definition of mahogany, however, is based on primary sources, except as indicated in the definition itself. I have profited greatly by my study of C. D. Mell's Biography of the Word Mahogany, but have relied on my own collections in drawing up my definition. The quotations collected from publications of the twentieth century have been taken from the following sources: (a) newspapers—New York Times, San Francisco Chronicle, and Los Angeles Times; (b) popular and trade journals—House Beautiful, Ladies' Home Journal, Family Circle, Asia, National Geographic Magazine, Motor Boating, American Lumberman, Wood Products, Popular Homecraft, Hardwood Record, Southern Lumberman, Veneers and Plywoods, New York Trade Lumber Journal; and (c) novels—Winston Churchill's Crisis and David Garnett's Pocahontas. For the usage of earlier centuries I have relied chiefly on the 45 quotations kindly supplied to me by the editors of the Dict. of American English (this dictionary is restricted to the 17th, 18th, and 19th centuries), but I have been able to add a few early quotations of my own finding.