He died at the age of 83 at his home in Hartford. The 1869 obituary in the New York Times says, Clerc came to Hartford in 1816 and became a teacher in 1817, then served more than 50 years "in the cause of deaf-mute instruction" and "his abilities, zeal, and graces of character made him always respected and loved."[1] Clerc married one of the first pupils Eliza Crocker Boardman.