William Clifford Heilman (September 27, 1877 – December 20, 1946) was an American composer. Born in Williamsport, Pennsylvania, where he also later died,[1] he composed a number of orchestral works as well as a good deal of chamber music; he also produced songs. Heilman was a graduate of Harvard University,[2] where he later taught for some time. Piano Trio in C Mino Op. 7 (1923) Piano Trio in C..