Complex sentence: He began as a crafter of steeple clocks in East Smithfield, near the Tower of London, becoming a member of Worshipful Company of Blacksmiths in 1631.
Split into simpler sentences: He began as a crafter of steeple clocks in East Smithfield, near the Tower of London. He became a member of Worshipful Company of Blacksmiths in 1631.