Complex sentence: He came back to Victoria in 1857 to establish James Blackwood as another manager-partner in Melbourne but after 1859 he lived permanently in England and his business headquarters remained there to the end of the 20th century.
Split into simpler sentences: He came back to Victoria in 1857 to establish James Blackwood as another manager-partner in Melbourne. After 1859 he lived permanently in England and his business headquarters remained there to the end of the 20th century.