...rt Walthall to the mouth of the river, shelling on both sides every spot likely to afford cover to a party of gray backs. On Friday two of the enemy's gunboats got aground opposite the residence of Mr. Marins Gilliam , and at last accounts had not been gotten off. The enemy were wasting a vast deal of ammunition in that direction yesterday and it was doubtless for the purpose of protecting these grounded craft fro...