index of titles and a first-line index of the texts would naturally suggest themselves. A first-line melodic index might serve for certain purposes, constructed on the following pattern: Arrange a single alphabet built upon a sequence of numbers from I to 20 and of letters, thus: I 2 3 4 5 6 7 8 9 I 24 6 7 8 o A B C D, etc. The figures in smaller type indicate the numbers II to 20. Let numbers designate ascending intervals counted by half-tones; letters, the descending intervals counted by half-tones, A denoting one halftone, B two half-tones, and so on. Record the rise and fall of pitch in the melody by numbers or letters, disregarding duration of the tone, so that a sequence of numbers and letters will represent the succession of ascending or descending intervals. The resultant formula, carried through the first phrase of an air, will serve as the index entry: e. g., for Abide with Me, the index entry would be BB72BBA, and for Lead, Kindly Light, 522BBC3CB. In the index, arrange the entries according to the union alphabet. Since numbers precede letters in the new alphabetical order, 522BBC3CB would precede BB72BBA. The system here sketched was first developed for an intended bibliography of printed airs associated with the 305 ballads published by Francis James Child (The English and Scottish Popular Ballads, 5 vols., Boston, 1882-98).* Such a bibliography could be printed at an average space expenditure of one or two lines of type for each recorded melody. A collection embodying entire airs-without words-might require, including the most necessary bibliographical references, an average consumption of five or six lines. The entire corpus of ballad airs, for which my own bibliographical accumulations contain a large and increasing number of full transcripts, could be printed at a minimal cost as compared with the ordinary mode of music printing. Other collections of simple tunes, addressed primarily to the musical or literary scholar rather than to the general public, might be made economically available by some such condensed notation.