Complex sentence: Thomas Frederick Colby (1 September 1784--9 October 1852), a British major-general and director of the Ordnance Survey (OS), was born at St. Margaret's, Rochester, Kent, England, as a member of a South Wales family.
Split into simpler sentences: Thomas Frederick Colby (1 September 1784--9 October 1852), was a British major-general and director of the Ordnance Survey (OS). He was born at St. Margaret's, Rochester, Kent, England, as a member of a South Wales family.