Complex sentence: In September, Bickerton was given the newly repaired HMS "Brune"; she was decommissioned in May the following year and Bickerton was without a ship until January 1787, when he commissioned HMS "Sibyl" and in her sailed for the Leeward Islands once more.
Split into simpler sentences: In September, Bickerton was given the newly repaired, HMS "Brune". The command was short-lived however, she was decommissioned in May the following year and Bickerton was without a ship until January 1787 when he commissioned HMS "Sibyl" and in her sailed for the Leeward Islands once more.