Some months after he died a guitar trio was found in Lou Harrison’s papers called Elegy for Harpo Marx, composed in 1964. The history of the piece is unclear but the version found was certainly written for guitar. Tanenbaum performed (premiered?) the work at the San Francisco Conservatory November 7, 2004 with Brian Dowdy and Rodrigo Placencia, and they recorded the work Nov. 25 for Mode Records.