Simplify the following text for a Grade 12 native English-speaking person.
Original: Donald Adamson ( born 30 March 1939 at Culcheth , Lancashire , now Cheshire ) is a historian , biographer , philosophical writer , textual scholar , literary critic , and translator of French literature .
Simplified: Dr Donald Adamson ( born on 30 March 1939 at Culcheth , Lancashire ) is a British historian , philosophical writer and literary critic .