In addition to the steps taken by the commandant of Norfolk Island for his internal security, the governor thought an increase of his military force absolutely necessary. Accordingly, the day after his Majesty's birthday, Lieutenant Creswell, with fourteen privates from the detachment of marines, embarked on board the _Supply_ for Norfolk Island; and at the same time he received a written order from his excellency to take upon himself the direction and execution of the authority vested in Mr. King, in the event of any accident happening to that officer, until a successor should be formally appointed and sent from hence. The _Supply_, on her return from Norfolk Island, was to visit the island seen by Lieutenant Shortland, and laid down by him, in the latitude of 28 degrees 10 minutes South. She was also to cruise for the shoal seen by that officer, and stated to be in the latitude of 29 degrees 20 minutes South, and for the shoal seen by Mr. Blackburn, the south end of which lay in the latitude of 29 degrees 25 minutes South; all of which, if the observations of both officers were equally correct, would, it was supposed, be found contiguous to each other. Lieutenant Ball was directed to land upon the island, if landing should be found practicable; and to determine, if he could, the extent and situation of the shoals. On these services the _Supply_ sailed the 6th of this month; on which day the governor set off with a party on a second excursion to Broken Bay, in the hope of being able, from the head of that harbour, to reach the mountains inland. His excellency returned to the settlement on the evening of the 16th, having discovered a capacious freshwater river, emptying itself into Broken Bay, and extending to the westward. He was compelled to return without tracing it to its source, not having a sufficient quantity of provisions with him; but immediately made the necessary preparations for returning to finish his examination of it; and set off on that design with an increased party, and provisions for twenty-one days, on Monday the 29th.