Saturday, the 12th September.—The miners were sent to Castle-Connell and to Castle-Carrick-a-gunnel, with orders to make several chambers ready for the blowing up those places when ordered. A Danish swimmer was sent over the water, in the night; with a rope to measure the breadth of the river where we design our bridge. It proved so rocky that he could not haul the said rope over, which, with the rapidness and breadth of it, the captain of the bridges concludes we have not boats enough to reach over, or that our anchors will hold.