Complex sentence: Some five years later he proceeded to the M.D. of Brussels, taking honours in medical jurisprudence; meantime he had entered as a law student at the Inner Temple, and had been admitted to the Bar.
Split into simpler sentences: Some five years later he earned his M.D. at Brussels, taking honours in medical jurisprudence. Meantime he had also entered as a law student at the Inner Temple, and was admitted to the bar.