that the terror that was upon them was mighty not only on the land but on the waters; for Lewis could not see that the boat could have been attacked by any ordinary means of destruction. From Merritt’s story, it must have been in shallow water. The shore of Larnac Bay shelves very gradually, and the Admiralty charts showed the depth of water two hundred yards out to be only two fathoms; this would be too shallow for a submarine. And it could not have been shelled, and it could not have been torpedoed; there was no explosion. The disaster might have been due to carelessness; boys, he considered, will play the fool anywhere, even in a boat; but he did not think so; the sailor would have stopped them. And, it may be mentioned, that the two boys were as a matter of fact extremely steady, sensible young fellows, not in the least likely to play foolish tricks of any kind. 

 Lewis was immersed in these reflections, having successfully silenced his brother-in-law; he was trying in vain to find some clue to the horrible enigma. The Midlingham theory of a concealed German force, hiding in places under the earth, was extravagant enough, and yet it seemed the only solution that approached plausibility; but then again even a subterranean German host would hardly account for this wreckage of a boat, floating on a calm sea. And then what of the tree with the burning in it that had appeared in the garden there a few weeks ago, and the cloud with a burning in it that had shown over the trees of the Midland village? 

 I think I have, already written something of the probable emotions of the mathematician confronted suddenly with an undoubted two-sided triangle. I said, if I remember, that he would be forced, in decency, to go mad; and I believe that Lewis was very near to this point. He felt himself confronted with an intolerable problem that most instantly demanded solution, and yet, with the same breath, as it were, denied the possibility of there being any solution. People were being killed in an inscrutable manner by some inscrutable means, day after day, and one asked “why” and “how”; and there seemed no answer. In the Midlands, where every kind of munitionment was manufactured, the explanation of German agency was plausible; and even if the subterranean notion was to be rejected as savoring altogether too much of the fairytale, or rather of the sensational romance, yet it was possible that the backbone of the theory was true; the Germans might have planted their agents in some way or another in the midst of our factories. But here in Meirion, what serious effect could be produced by the casual and indiscriminate slaughter of a couple of schoolboys in a boat, of a 

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