FOOTNOTES 1 The principal arguments of Mr. Collins's dissertation may be consulted in two articles: "The performance of sesquialtera and hemiolia in the 16th century" , JAMS 17: 5-28 (Spring 1964), and "The performance of triplets in the 17th and 18th centuries", JAMS 19:281-328 (Fall 1966). 2 These theorists incelude Finck, 1556; Quitschreiber, 1607; Vulpius, 1608; Beringer, 1610; Elsmann, 1619; Gengenbach, 1626; Hase, 1657; and TrUmper, 1668. REPLY TO ARTHUR HILLS Michael Collins Mr. Hills's main criticism of my work is aimed at my "failure to fashion an adequate method". It seems to me that there is a great deal of talk about method lately; but certainly no matter how airtight the researcher's method, it is no substitute for his having investigated all sources, finally choosing those relevant to the subject. This has been my "method", and the virtually com- plete list of l6th-, 17th-, and 18th-century theorists consulted can really not be listed. I chose those who seemed to be talking about real practice rather than abstract mathematical theory. Mr. Hills has turned up no new sources, to contradict my theory; instead, he has attacked it on the rather dubious grounds of national styles. We shall for the moment leave 'aside the 17th-century German theorists of the conservative camp who so clearly call for resolutions of three black minims