...ommanding Balch, and the Potomska, Acting Lieutenant Commanding Watmough, with the launch and howitzer of the Mohican, in charge of Lieut. Miller, proceeded to open the interior communication between St. Simon's Sound and the Altamaha River. He soon encountered an obstruction, consisting of a double row of heavy piles, with their tops just above water at low tide. In a few hours a sufficient number were remove...