"Then, Mr. Felix Briarfield," said I, riding back to the inn, "then we will see how much your astuteness will avail you."

It was late in the afternoon when I got back to the inn, and the cold vapors of the marsh made me shiver. As I am subject to rheumatism, I was afraid of future sufferings, so, having some brandy in my flask, I determined to light a fire for the purpose of heating water, and comforting myself with a hot drink. There was plenty of fuel about, and I had matches in my pocket. I began to rake the dead ashes out of the dining-room grate, when I disturbed an oblong piece of flint which rattled on to the earth. All ideas of lighting a fire were forgotten as I stood with that in my hand. It was an arrowhead. I handled it gingerly, for I knew well that it was steeped in poison, and that with this Francis had been murdered.

I saw at once what had taken place. Felix had arrived, and had gone up to his brother's room. Holding the flint with the razorlike edge outward, he had shaken hands with his brother, and so wounded him. A quarrel had ensued, but Francis, not thinking he was poisoned, never dreamed of his danger. Then he had fallen dead, and Felix, placing the body on the bed, had returned to the dining room, and flung the poisoned arrowhead into the fire. The most astounding thing was that I had not been awakened by the outcry of Francis, but I suppose I was quite worn out by my walk and in too deep a sleep. Nevertheless, it was strange that I had heard neither the arrival of Felix nor the struggle which must have taken place. Possibly I had been drugged.

With this damning piece of evidence in my pocket, wrapped up in paper,--for I feared the poison myself,--I rode back to Marshminster, wondering how Felix had hit upon such a terribly ingenious fashion of removing his brother. So far as I knew he had not traveled much, and would not be likely to have any savage weapons in his possession; yet he could not have owned a flint arrowhead in the ordinary run of things. This puzzled me greatly.

I returned the horse to Fundy without making any remarks, and, thoroughly tired out, went early to rest, still puzzling over that arrowhead. Before dawn I solved the mystery. In the entrance hall of the Bellins' house a perfect armory of savage weapons were arrayed against the wall. There were clubs, arrows, bows, mats, and grinning heathen gods. Doubtless Felix, knowing the arrows to be poisoned, had taken the flint head of one in order to put his brother to death. As early as I could I went to Bellin Hall to satisfy myself on this point.

The Hall was a show place, as it possessed a fine picture gallery, so I had but little difficulty in gaining admission from the woman in charge. Requesting permission to examine the warriorlike implements patterned against the hall wall, I narrowly observed the arrows. It was as I thought--one of the arrows was missing, and Felix had stolen it in order to kill his brother! I did not take much interest in the pictures after such a discovery, and the talk of the housekeeper fell unheeded on my ears. Finally I gave her a sovereign, and left the house, impatient to be alone and think over my discoveries.

I had now sufficient evidence to prove that Felix had killed Francis, and quite sufficient to warrant my having him arrested. If the pool were dragged, the body would be found, with the ragged wound of the flint arrowhead on the right hand. I could prove the finding of the arrowhead in the ashes, and how it had been taken from Bellin Hall. Fundy could give evidence to Felix having taken a horse to the Fen Inn on the 10th, and also on the 11th. And, altogether, the evidence against Felix was clearly sufficient to hang him. Still, I did nothing rashly, and before taking further proceedings returned to London to consult Merrick. His advice, I knew, would be judicious.

CHAPTER IX.

[ANOTHER SURPRISE.]

Dr. Merrick was delighted to see me again so speedily, and assured me that he had thought of nothing else but the Lone Inn crime. The peculiar circumstances of the case fascinated him greatly. "Decidedly I should be a detective," he said laughingly. "I have been inventing all kinds of theories in connection with this matter. By the way, my idea of searching the shipping list was a good one."