trawler's crew had observed a red flash from a
distant headland.
Those who man these filthy craft are largely of the naval reserve class—men out of comfortable homes and convenient clubs. Consequently they bring to their work an exceptional intelligence. They didn't dash in shore in the hope of finding something. The light suggested too many possibilities. Instead, they held their patrol and at the first opportunity reported to the Admiralty. There have been many rumours of a German submarine base hidden away on the shores of the British Isles. The Admiralty, therefore, ordered the trawler to keep about its routine work while an intelligence man with the clothing and accent of the vicinity, appeared in the nearest town. He had to work carefully. Often at night he slipped out and crawled through underbrush and behind the rocks, seeking out that base which the signalling had suggested. He found no indication of a base, no likely cache for supplies. He reported the existence of a cove behind the headland. There was a beach, favourable for the landing of a small boat. The neighbourhood was wild. There was only one house within a radius of several miles. It was occupied by an unkempt old man who had consistently turned back his efforts at an entrance, who had snubbed his attempts to
