Complex sentence: Elsynge was the eldest son of Henry Elsynge, was born at Battersea in 1598, educated at Westminster under L. Osbeldiston, and entered Christ Church, Oxford, as a commoner, 1621, proceeding B.A.1625.
Split into simpler sentences: Elsynge was the eldest son of Henry Elsynge, and was born at Battersea. He was educated at Westminster School under L. Osbeldiston, and entered Christ Church, Oxford, as a commoner, 1621, proceeding B.A.1625.