Complex sentence: James Gregg Parsons, his eldest son, was born in Hampshire County in 1773, and in 1795, he married Mary Catherine Casey (1773--1846), whose family owned the adjoining Lot Number 21.
Split into simpler sentences: James Gregg Parsons, his eldest son, was born in Hampshire County in 1773. In 1795 he married Mary Catherine Casey (1773--1846), whose family owned the adjoining Lot Number 21.