As head of CIA’s printmaking department from 1957 (which he created) until his retirement in 1991 as Professor Emeritus, he also patiently passed on to several generations of young artists everything he knew about making prints—and about seeing. Cleveland artist/critic and former student Douglas Max Utter remembered Cassill as a gifted artist and great teacher who continually sought “new ways to sense the texture of time, and patience, and the weight of things pressing into the contours of the self.” His print-drawings report on the world, said Utter, “the way a leaf reports on the wind.”