He was born December 20, 1812. He died at age 42 on March 19, 1855. The third son of the eighth president never married. He spent most of his adult life serving his father as a White House secretary and then as a personal assistant. He arranged the former president's papers for posterity. When he fell ill, his father sent him to Europe to find a cure. But sadly "Mat" died in Paris his grieving father at his side.