Complex sentence: He became Constable of the Tower of London in January 1887 but died of influenza at Eaton Square in London on 14 January 1890 and was buried in St Paul's Cathedral.
Split into simpler sentences: He became Constable of the Tower of London in January 1887. He died of influenza at Eaton Square in London on 14 January 1890 and was buried in St Paul's Cathedral.