41. “He preserved them with the same obsession that other composers have destroyed theirs, moving them from one apartment to the next over a period of thirty-five years,” writes Douglas Johnson in The Beethoven Sketchbooks (3). By simple count of the entries in that book, the repertory comprises thirty-three large-format sketchbooks, thirty-seven “pocket” sketchbooks, a very large portfolio of miscellaneous work papers assembled from roughly 1785 until 1798, and in addition, a good many independent sketch leaves and drafts in score.