Complex sentence: Moore's father was a prominent banker and merchant in Utica, NY; his mother had been a daughter to George Beckwith, also a banker, a mid- 18th century graduate of Yale College, and member of the original Yale Corporation.
Split into simpler sentences: Moore's father was a prominent banker and merchant in Utica, New York. His mother had been a daughter to George Beckwith, also a banker, a mid- 18th century graduate of Yale College, and member of the original Yale Corporation.