As a young photographer, Jacques Lowe was assigned to photograph and up-and-coming Washington attorney named Robert Kennedy. Mr. Lowe's work impressed the Kennedy family so much that Joseph Kennedy asked that his other son, then U.S. Senator John F. Kennedy, be photographed as well. From that favor granted sprung a very close and personal relationship. As a result, Lowe took over 40,000 photos, including the White House years. •Exquisite black and...