1963 Apr. 22
McCormack, Mark H.
Franklin Park (Ill.) - Hibben notes that he will be in Cleveland and invites McCormack out to dinner and drinks.
Mark H. McCormack Papers
1967 May 2
Franklin Park (Ill.) - Hibben thanks McCormack for sending an autographed picture of Arnold Palmer for his son, Gene. Brief mention of the upcoming Fall Croquet-Golf Tournament.