He married Margaret `` Peggy '' McGrath ( September 28 , 1915 -- March 26 , 1996 ) on September 7 , 1940 . She was the daughter of a partner in a prominent Wall Street law firm .
He married Margaret `` Peggy '' McGrath on September 7 , 1940 ; ( September 28 , 1915 -- March 26 , 1996 ) , she was the daughter of a partner in a prominent Wall Street law firm .