Complex sentence: In 1733, when he was age 19, he was living in New Jersey and married; his wife's name was Sarah and all that is known about her is that she died in childbirth, as did their only child.
Split into simpler sentences: In 1733, when he was age 19, he was living in New Jersey and married. His wife's name was Sarah and all that is known about her is that she died in childbirth, as did their only child.