Merrick, to express his happiness, as musically beat out a rhythm into his pillow to Sir Treves.
Why was John Merrick called the Elephant Man?
Merrick suffered scoliosis from an early age, as well as cranial bone overgrowth, skin that protruded from his face, and an enlarged right arm. Due to the skin on his face, he earned the nickname "The Elephant Man."
Ashley Montage's 1973 book The Elephant Man, A Study in Human Dignity, published by Ballantine Books, deserves considerable praise for resurrecting interest in the tale.
As a result, option (a) he musically beat out a rhythm into his pillow is correct.
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