Entered from booking ledger and New York Times concert listing and review. Although the listing indicates that Ezra Laderman's Partita (Contrasts for Cello) was to be played, the review suggests it was replaced with Laderman's Theme and Variations for Violin and Piano. Additionally, although some of the works by American composers were truly first performances, since Ivo Cruz's Sonata for Violin and Piano was composed in 1922, it is assumed this performance was the United States premiere. Neither the listing nor the review name the members of the Kohon String Quartet; the personnel listed here is based upon that of a performance in January, 1956. WORLD PREMIERE of Ezra Laderman's THEME AND VARIATIONS FOR VIOLIN AND PIANO U.S. PREMIERE of Ivo Cruz's SONATA FOR VIOLIN AND PIANO WORLD PREMIERE of Cecily Lambert's 3 SONGS ON POEMS OF A. E. HOUSMAN WORLD PREMIERE of Marvin David Levy's THE ECHOES "CONCERT AND OPERA PROGRAMS FOP THE WEEK." New York Times (1923-Current file), Apr 22 1956, p. 120. ProQuest. Web. 15 Mar. 2021. "TWILIGHT CONCERT PERFORMED HERE: NEW CHAMBER MUSIC HEARD AT CARNEGIE RECITAL HALL --VOCAL WORKS OFFERED." New York Times (1923-Current file), Apr 29 1956, p. 77. ProQuest. Web. 16 Mar. 2021.