Complex sentence: The family arrived here in the 1780s and opened a blacksmith's shop in Newtown, their names appear in certain documents of the time, but they rose to prominence in the 1860s.
Split into simpler sentences: The family arrived on the island in the 1780s and opened a blacksmith's shop in Newtown. Their names appear in certain documents of the time, but they rose to prominence in the 1860s.