CALLCOTT, JOHN WALL (1766-1821), English mu sician, brother of Sir Augustus Callcott, R.A., was born in Ken sington Nov. 20, 1766, his father having been a bricklayer and builder. His reputation as a composer rests chiefly upon his con certed vocal works, such as the catch "0 beauteous fair," the canon "Blessed is he" and the glee "Dull repining sons of care." Callcott's son, WILLIAM HUTCHINS CALLCOTT in herited to a large extent the musical gifts of his father. His song, "The last man," and his anthem, "Give peace in our time, 0 Lord," were his best-known compositions.