Married to Mrs. Mary H. Bennett Who Was Divorced in 1920 at Crown Point, IndianaChicago, Oct. 18—Louis F. Swift, Jr., son of the multimillionaire head of Swift and Co., Chicago packers eloped yesterday with Mrs. Mary II. Bennett, a beautiful Pittsburgh divorcee, and the couple was married at Crown Point, Ind., by Judge Howard Kemp.Young Swift told the county clerk