Complex sentence: Leighton was a judge with the Circuit Court of Cook County, Illinois from 1964--69, and was a judge with the First District Appellate Court of Illinois from 1969-76.
Split into simpler sentences: Leighton was appointed as a judge with the Circuit Court of Cook County, Illinois, serving from 1964--69. He was appointed as a judge with the First District Appellate Court of Illinois, serving from 1969-76.