[Cage, John. (1912–1992)] Thomson, Virgil. (1896–1989). Signed Excerpt on Cage from "American Music Since 1910". Typed excerpts about John Cage, from Thomson's 1972 volume American Music Since 1910, signed by the author. Thomson gives a colorful and direct description of his colleague, describing him as having "all the tough qualities of the traditional mountaineer submissive to no authorities academic or federal." On light yellow paper; in very fine condition. 8.5 x 11 inches (21.6 x 28 cm).