Merritt, as the doctor guessed, had a kind of uneasy feeling--it scarcely amounted to a suspicion--as to the business of the marsh; chiefly because he thought the official talk about the railway embankment and the course of the river rank nonsense. But finding that nothing more happened, he let the matter drop from his mind, and settled himself down to enjoy his holiday.
He found to his delight that there were no sentries or watchers to hinder him from the approach to Larnac Bay, a delicious cove, a place where the ash-grove and the green meadow and the glistening bracken sloped gently down to red rocks and firm yellow sands. Merritt remembered a rock that formed a comfortable seat, and here he established himself of a golden afternoon, and gazed at the blue of the sea and the crimson bastions and bays of the coast as it bent inward to Sarnau and swept out again southward to the odd-shaped promontory called the Dragon's Head.
Merritt gazed on, amused by the antics of the porpoises who were tumbling and splashing and gambolling a little way out at sea, charmed by the pure and radiant air that was so different from the oily smoke that often stood for heaven at Midlingham, and charmed, too, by the white farmhouses dotted here and them on the heights of the curving coast.
Then he noticed a little row-boat at about two hundred yards from the shore. There were two or three people aboard, he could not quite make out how many, and they seemed to be doing something with a line; they were no doubt fishing, and Merritt (who disliked fish) wondered how people could spoil such an afternoon, such a sea, such pellucid and radiant air by trying to catch white, flabby, offensive, evil-smelling creatures that would be excessively nasty when cooked.
He puzzled over this problem and turned away from it to the contemplation of the crimson headlands. And then he says that he noticed that signalling was going on. Flashing lights of intense brilliance, he declares, were coming from one of those farms on the heights of the coast; it was as if white fire was spouting from it. Merritt was certain, as the light appeared and disappeared, that some message was being sent, and he regretted that he knew nothing of heliography. Three short flashes, a long and very brilliant flash, then two short flashes. Merritt fumbled in his pocket for pencil and paper so that he might record these signals, and, bringing his eyes down to the sea level, he became aware, with amazement and horror, that the boat had disappeared. All that he could see was some vague, dark object far to westward, running out with the tide.
Now it is certain, unfortunately, that the Mary Ann was capsized and that two school-boys and the sailor in charge were drowned. The bones of the boat were found amongst the rocks far along the coast, and the three bodies were also washed ashore. The sailor could not swim at all, the boys only a little, and it needs an exceptionally fine swimmer to fight against the outward suck of the tide as it rushes past Pengareg Point.
But I have no belief whatever in Merritt's theory. He held (and still holds, for all I know), that the flashes of light which he saw coming from Penyrhaul, the farmhouse on the height, had some connection with the disaster to the Mary Ann. When it was ascertained that a family were spending their summer at the farm, and that the governess was a German, though a long-naturalized German. Merritt could not see that there was anything left to argue about, though there might be many details to discover. But, in my opinion, all this was a mere mare's nest: the flashes of brilliant light were caused, no doubt, by the sun lighting up one window of the farmhouse after the other.
Still, Merritt was convinced from the very first, even before the damning circumstance of the German governess was brought to light; and on the evening of the disaster, as Lewis and he sat together after dinner, he was endeavouring to put what he called the common sense of the matter to the doctor.
"If you hear a shot," said Merritt, "and you see a man fall, you know pretty well what killed him." There was a flutter of wild wings in the room. A great moth beat to and fro and dashed itself madly against the ceiling, the walls, the glass bookcase. Then a sputtering sound, a momentary dimming of the lamp. The moth had succeeded in its mysterious quest.
"Can you tell me," said Lewis as if he were answering Merritt, "why moths rush into the flame?"
Lewis had put his question as to the strange habits of the common moth to Merritt with the deliberate intent of closing the debate on death by heliograph. The query was suggested, of course, by the incident of the moth in the lamp, and Lewis thought that he had said:
"Oh, shut up!" in a somewhat elegant manner. And, in fact Merritt looked dignified, remained silent, and helped himself to port.
That was the end that the doctor had desired. He had no doubt in his own mind that the affair of the Mary Ann was but one more item in a long account of horrors that grew larger almost with every day; and he was in no humour to listen to wild and futile theories as to the manner in which the disaster had been accomplished. Here was a proof 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 their 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 fairy-tale, 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 school-boys in a boat, of a harmless holiday-maker in a marsh? The creation of an atmosphere of terror and dismay? It was possible, of course, but it hardly seemed tolerable, in spite of the enormities of Louvain and of the Lusitania.
Into these meditations, and into the still dignified silence of Merritt broke the rap on the door of Lewis's man, and those words which harass the ease of the country doctor when he tries to take any ease: "You're wanted in the surgery, if you please, sir." Lewis bustled out, and appeared no more that night.