Complex sentence: In 1877, his decree nisi from Ellen Terry finally came through and the Grosvenor Gallery was opened by his friend Coutts Lindsay-this was to prove his ideal venue for the next ten years.
Split into simpler sentences: In 1877, his decree nisi from Ellen Terry finally came through, and the Grosvenor Gallery was opened by his friend Coutts Lindsay. This was to prove his ideal venue for the next ten years.