Complex sentence: Within a year after Newtown was settled, some of its proprietors began moving away from the central village and to some of their larger parcels, and several proprietors with land in the same area tended to move out together to reduce isolation.
Split into simpler sentences: Within a year of the settlement of Newtown, some of its proprietors began moving away from the central village to some of their larger parcels. Several proprietors with land in the same area relocated to these areas together to reduce isolation.