Complex sentence: He enjoyed his undergraduate days at Oxford where he won renown as a debater, and after several terms of reading law, he was called to the Bar in 1887, at the age of twenty-three.
Split into simpler sentences: He enjoyed his undergraduate days at Oxford, where he won renown as a debater. After several terms of reading law, he was admitted to the Bar (permitted to practice as a barrister), in 1887, at the age of twenty-three.