The night of the 12th was a wretched one in some respects for our purpose. The weather was thick; a strong breeze was blowing from the southward, kicking up a nasty sea; it was bitterly cold; and a thin drizzle of fine snow made the thick atmosphere still thicker; so that it was impossible to see farther than a ship's length in any direction. I foresaw, therefore, that I had a very difficult task before me, not only in getting the little torpedo-boats across in the heavy sea, but in depositing the mines in the right place after we should arrive. To spare the torpedo-boats as much as possible while making the passage against a heavy head sea, I decided to proceed at a speed of ten knots; and we accordingly got under way at five o'clock in the evening, leaving ourselves an hour in hand to cover any delay which we might meet with. I had very carefully studied the tides and the current charts during the afternoon, taken careful note of the strength of the wind, and, taking these matters into consideration, had worked out a course that, unless some of the conditions changed, should take me to the exact spot I wished to reach, at eleven o'clock. Punctual to the moment we started, "in line ahead," each vessel towing a fog buoy behind her to serve as a guide to the next astern, and these buoys I had at the last moment caused to be coated with luminous paint, to make them visible in the intense darkness. All went well with us; the destroyers rode the seas like gulls, while, at the moderate speed of ten knots, the torpedo-boats were not only able to keep station perfectly but also avoided washing their crews overboard. At ten-thirty I made the prearranged signal, and my escort hove-to, leaving me to finish my journey and carry out my perilous task alone. I knew exactly where I was--or rather, where I ought to be--for I had kept a careful reckoning of our progress from the moment of starting, and, unless something had gone wrong, we were then exactly two miles south-east of the Pinnacle Rock lighthouse. But it was necessary to make sure, otherwise I might lay my mines in the wrong place, and all my labour would be useless; I accordingly shaped a course for the lighthouse and cautiously stood in, with a leadsman stationed at each extremity of the overhanging navigating bridge. These took continuous casts of the lead and reported the result to me through my "Number 1," who stood outside my cabin and called to me through an open window, while I stood at the table, with the chart spread open before me, pricking off our position minute after minute, and comparing the leadsmen's results with those shown on the chart, the two agreeing accurately.