'Instructions for the better ordering of his majesties ships under command in sailing ... and in fighting', issued by Henry, Duke of Grafton, Vice-Admiral of England and Chief Command of his Majesties shipps...' .
'Instructions for the better ordering of his majesties ships under command in sailing ... and in fighting', issued by Henry, Duke of Grafton, Vice-Admiral of England and Chief Command of his Majesties shipps...' to Captain Giffard, Commander of the MERMAYD, 1687.