Cage, John. (1912–1992). Variations III - AUTOGRAPH MUSICAL QUOTATION. A remarkable and unusual signed musical quotation from the innovative and influential American composer. Probably from Cage's “Variations III," which the composer described as "a highly indeterminate piece" where "the straight lines are the various parameters of sound and the points are sounds." In blue ink, on a graphically striking postcard illustration by fluxus artist George Brecht, titled "John Cage: Variations III."