Memorials may be made to Pujols Foundation (Downs Syndrome). Mary Sue Callahan, of St. Peters, Missouri, (formerly of St. Paul) died on Tuesday, December 29, 2009 at the age of 53. Dear daughter of the late James and Martha Callahan; dearest niece of Mary B. (James) Machens; dear cousin of Lori Machens, Karen (Charles) Kuehler, Cathy (Stuart) McCathie and Chris (Bill) Webb. She is also survived by many cousins, relatives and friends. Loving niece of the late Walter and brother, Jude Ungering. Mary Sue was the Postmaster at St. Paul Post Office for 19 years. She was a member of St. Paul Catholic Church and a member of the Red Hats. On behalf of the family, we would like to thank St. Peters Manor Care Center for all their kind and compassionate care.