For a time people said that there must be a madman at large, a sort of country variant of Jack the Ripper, some horrible pervert who was possessed by the passion of death, who prowled darkling about that lonely land, hiding in woods and in wild places, always watching and seeking for the victims of his desire.

Indeed, Dr. Lewis, who found poor Williams, his wife, and children miserably slaughtered on the Highway, was convinced at first that the presence of a concealed madman in the countryside offered the only possible solution to the difficulty.

"I felt sure," he said to me afterwards, "that the Williamses had been killed by a homicidal maniac. It was the nature of the poor creatures' injuries that convinced me that this was the case.

"Some years ago—thirty-seven or thirty-eight years ago as a matter of fact—I had something to do with a case which on the face of it had a strong likeness to the Highway murder. At that time I had a practice at Usk, in Monmouthshire. A whole family living in a cottage by the roadside were murdered one evening; it was called, I think, the Llangibby murder; the cottage was near the village of that name. The murderer was caught in Newport: he was a Spanish sailor, named Garcia, and it appeared that he had killed father, mother, and the three children for the sake of the brass works of an old Dutch clock, which were found on him when he was arrested.

"Garcia had been serving a month's imprisonment in Usk gaol for some small theft, and on his release he set out to walk to Newport, nine or ten miles away; no doubt to get another ship. He passed the cottage and saw the man working in his garden. Garcia stabbed him with his sailor's knife. The wife rushed out; he stabbed her. Then he went into the cottage and stabbed the three children, tried to set the place on fire, and made off with the clockworks. That looked like the deed of a madman, but Garcia wasn't mad—they hanged him, I may say—he was merely a man of a very low type, a degenerate who hadn't the slightest value for human life. I am not sure, but I think he came from one of the Spanish islands, where the people are said to be degenerates, very likely from too much interbreeding.

"But my point is that Garcia stabbed to kill and did kill, with one blow in each case. There was no senseless hacking and slashing. Now those poor people on the Highway had their heads smashed to pieces by what must have been fatal, but the murderer must have gone on raining blows with his iron hammer on people who were already stone dead. And that sort of thing is the work of a madman, and nothing but a madman. That's how I argued the matter out to myself just after the event.

"I was utterly wrong, monstrously wrong. But who could have suspected the truth?"

Thus Dr. Lewis, and I quote him, or the substance of him, as representative of most of the educated opinion of the district at the beginnings of the tenor. People seized on this theory largely because it offered at least the comfort of an explanation, and any explanation, even the poorest, is better than an intolerable and terrible mystery. Besides, Dr. Lewis's theory was plausible; it explained the lack of purpose that seemed to characterize the murders. And yet there were difficulties even from the first. It was hardly possible that a strange madman should be able to keep hidden in a countryside where any stranger is instantly noted and noticed; sooner or later he would be seen as he prowled along the lanes or across the wild places. Indeed, a drunken, cheerful, and altogether harmless tramp was arrested by a farmer and his man in the fact and act of sleeping off beer under a hedge; but the vagrant was able to prove complete and undoubted alibis, and was soon allowed to go on his wandering way.

Then another theory, or rather a variant of Dr. Lewis's theory, was started. This was to the effect that the person responsible for the outrages was, indeed, a madman; but a madman only at intervals. It was one of the members of the Porth Club, a certain Mr. Remnant, who was supposed to have originated this more subtle explanation. Mr. Remnant was a middle-aged man, who, having nothing particular to do, read a great many books by way of conquering the hours.

He talked to the club—doctors, retired colonels, parsons, lawyers—about "personality," quoted various psychological text-books in support of his contention that personality was sometimes fluid and unstable, went back to Dr. Jekyll and Mr. Hyde as good evidence of his proposition, and laid stress on Dr Jekyll's speculation that the human soul, so far from being one and indivisible, might possibly turn out to be a mere polity, a state in which dwelt many strange and incongruous citizens, whose characters were not merely unknown but altogether unsurmised by that form of consciousness which so rashly assumed that it was not only the president of the republic but also its sole citizen.

"The long and the short of it is," Mr.