Complex sentence: Having been educated at the Jesuit school in the town, and afterwards at the Collège Mazarin, he became an advocate, and was placed in the office of a lawyer named Prieur at Paris.
Split into simpler sentences: Having been educated at the Jesuit school in the town, and afterwards at the Collège Mazarin. He became an advocate, and was placed in the office of a lawyer named Prieur at Paris.