Search contuinues in sunk ship mystery . An admiralty ship is standing by . Walton on the 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 " Yarrowdale " . Photo shows ; the admiralty survey vessel cruising near the spot where the mystery ship is believed to have sunk . 25 March 1934