 Complete the following phrase:  His next appointment came in 1777, with the command of HMS Boyne. He sailed with her the following year to join Rear-Admiral Samuel Barrington off the West Indies, and was present at the repulse of Charles Hector, comte dEstaings attempt to capture St Lucia on 15 December that year. Sawyer remained in the Caribbean, and was present at the Battle of Grenada as part of Vice-Admiral John Byrons fleet on 6 July 1779. Sawyer returned to England in the autumn, and was given command of HMS Namur in 1780. He commanded her in the English Channel, and was present at the 