 Mark Eden Horowitz is a senior music specialist at the Library of Congress, where the Brickus papers join those of Leonard Bernstein, Richard Rodgers, the Gershwins. We estimate our holdings, the music division, at between 25 and 27 million items. The Brickus collection contains scripts, musical scores, notes for ideas on shows that never came together, recordings. He was a completist, and he saved everything. For instance, I believe all recordings of Dr. Doolittle.