Mrs. Helen Clark Mitchell, age 80, of McKinney, Texas passed away February 26, 2004, at North Central Medical Center. She was born January 18, 1924, in Paris, Texas to William Charles and Estelle (Hudson) Clark. On April 17, 1954, she married Billy H. Mitchell in Paris. Mrs. Mitchell was a faculty member at Southwest Medical School for many years. She was of the Presbyterian faith. She is survived by her husband, Billy Mitchell; son, Dr. William C. Mitchell and wife, Molly of McKinney; grandchildren, Elizabeth, Matthew, Nathan and Ryan Mitchell all of McKinney. A memorial service will be held at 3:00 p.m., Saturday, February 28, 2004, at Preston Hollow Presbyterian Church, 9800 Preston Rd., Dallas with Rev. Fran Shelton officiating.