SOUTHEND, ESSEX.—During a heavy gale from the S.W., on the 8th December, the Dutch schooner Wietska parted both anchors and chains and drove ashore onthe Knock Sands off Shoeburyness. In response to her signals of distress the Life-boat Boys of England proceeded to her assistance, at 8.45 A.M., and rescued her crew consisting of five men. The Life-boat afterwards returned to the vessel and placed five men on board to take charge of her until the ebb tide; they pumped her dry and got her afloat as the tide rose in the evening; but she immediately sunk again..