 Johnston led the troops that deposed Governor William Bligh, assumed the title of lieutenant-governor, and illegally suspended the judge-advocate and other officials.The administration of justice became farcical, and there were signs of strong discontent among the settlers.Johnston was promoted to the rank of lieutenant-colonel on 25 April 1808, and was superseded by his senior officer Joseph Foveaux, who was Lieutenant-Governor of Norfolk Island, on 28 July.