Les and Miriam Clark produced one biological daughter, Miriam Leslie
Clark Weible.
Les Clark adopted Richard, son of first wife Miriam Laurtzen.
Les Clark was the "longest continuously employed member of Walt Disney
Productions". (According to John Canemaker's book "Walt Disney's Nine
Old Men and the Art of Animation")
Employment at Walt Disney Productions from February 23, 1927 to his
retirement on September 30, 1975.