Search contuinues in sunk ship mystery . An admiralty ship is standing by . Walton on Naze lifeboat has been searching the sea for traces of a steamer reported to have been wrecked near the Kentish Knock lightship , 18 miles from the North Foreland lighthouse . Coastguard and lifeboat authorities are puzzled by the mystery wreck , which was reported by the captain of an outward bound steamer ' Yarrowwdale ' . Photo shows ; a wreck flag . 25 October 1934