[36] See for quotations from the sketch-books, Mason's "Beethoven and His Forerunners," pp. 304-314. Several of the complete sketch-books, edited by Nottebohm, are published by Breitkopf and H?tel.

[37] See Von Lenz's "Beethoven et ses trois styles."

[38] In numbering the measures, begin with the first (partial) measure, even though it is incomplete.