from the belleisle and revenge close on the beam , come the voices of william hargood and robert mowson , drifting on the breezewho through cowardice , negligence or disaffection shall in time of action withdraw or not go into the fight or engagement ; shall not do his utmost to take or destroy every ship which it shall be his duty to engage , every such person so offending and being convicted thereof by the sentence of the court martial , shall suffer death .