Yale Gracey (1910 - September 5, 1983) was a Disney Imagineer, writer, and layout artist for many Disney animated shorts, including classics such as The Three Caballeros and Fantasia. He designed many of the special effects for the Disney ride Haunted Mansion and the fire effect used in the Pirates of the Caribbean attraction. He was honored by having "Master Gracey" named after him. Yale died on September 5, 1983, at the age of 73. Gracey was shot along with his wife in Los Angeles by a burglar. The circumstances were never revealed.
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. Although it is not technically about Yale, it does have an informative biography.