"How have you learnt all this?" "He is important enough to have some of his doings chronicled, and he wrote some interesting articles for a country gentlemen's newspaper about his Normandy tour--nature studies, and such like. Another point, both these murders happened at the time of the full moon. I am not absolutely sure, but I think you will find that for the last half-dozen years Sir Henry has not been in England in January." "You think----" "I think there would have been other heads missing if he had been," Quarles answered. "He was sane enough to be somewhere where he was not known when this time of the year came round. At the full moon he is always queer--witness last night; but he is only dangerous in January--dangerous, I mean, without provocation. To preserve his secret, I have little doubt he would go to any length; that is why I warned you to be ready to shoot when we went upon our journey of discovery. Now this year he was in England; illness had kept him to his house yonder, but he was well enough to get out at the fatal time, and the insane desire proved irresistible. He was cunning too. He must know everybody in the neighborhood, yet the man he killed was unknown. We shall find presently, I have no doubt, that the victim was some wanderer returning unexpectedly to friends in Withan. That would account for the foreign cut of his clothes. Sir Henry, waiting in the wood, perhaps for hours, may have allowed others to pass before this man came. He realized that he was a stranger, and attacked him." "But the head?" "Was among those hanging over the fire. Sir Henry was for many years in Borneo, Wigan, and for a large part of the time was up-country helping to put down the head-hunting which still existed there, and still does exist, according to all accounts, when the natives think they can escape detection. The horrible custom proved too much for his diseased brain, and fascinated him. You see how my theory grew. Then I looked for the actual proof, which we found last night. The long shed in that pit is built exactly as the Dyaks of Borneo build theirs--a whole village living on communal terms under one roof. The stone slab for the fire is the same, and over it the Dyaks hang the treasured heads, just as we saw them last night. Now you had better go and see the police, Wigan. Don't drag me into it. I am going back to London by the midday train." * * * * * The arrest of Sir Henry Buckingham caused an enormous sensation. He was subsequently put into a lunatic asylum, where he died not many months afterward. Fortunately he had no children to run the risk of madness in their turn, and neither his wife nor any of the servants knew anything of the concealed pit where he went to revel in his insane delight. Hidden under the long shed the heads were found--six of them, five so hideously shriveled that identification was altogether impossible.