A London correspondent telegraphs the following incident:

“The master of the Grimsby steam trawler Agatha reports that while fishing in the North Sea he sighted a ship’s boat afloat, and supposing that some disaster had occurred went toward it, put out a boat and found the derelict to be a lifeboat supplied with sails, mast and oars. The Agatha tried to tow the prize home, but immediately an explosion occurred, luckily too far distant to harm the trawler.

“A careful examination revealed that a mine had been attached to the lifeboat by ropes and wires in such a manner as to explode and blow up any ship which steamed alongside the lifeboat to pick it up.”