Complex sentence: The Admirable Crichton means James Crichton of Eliock and Cluny a sixteenth century polymath who lived in Dumfries and Galloway in Scotland., and was renowned for his learning in many fields.
Split into simpler sentences: The Admirable Crichton refers to James Crichton of Eliock and Cluny, a sixteenth century polymath who lived in Dumfries and Galloway in Scotland. He was renowned for his learning in many fields.