Cage, John. (1912–1992) Autograph Letter - "I am...busy writing a longish book and 24 Qts""ALS on the composers personal Note o Gram with original written sheet and pink copy. One page, dated January 4, 1977. Cage writes in full: "Thank you for the letter and for sending the tape. Unfortunately I do not have a cassette or tape machine + my circumstances keep me either over committed here or traveling. I go the day after tomorrow to LA + then back here for a week + then to Paris for 2 wks. Perhaps in Feb. I may have an occasion to search out