Though more mystified than ever with this explanation, it was the only one I could get, and we walked on talking of other matters until we came within a field of the house. The darkness had almost fallen by this time, though back across the undulating country I could just see the dark ridge where the tree tops rose above the side of the valley.
"I'm going to fire," said Miles; "it saves the bother of drawing the charge."
The report of the piece rang out, and echoed over the quiet country, and as though in answer to the sound there came out of the distance the sharp bark of a dog. It was evident that the man Lewis was still enjoying his evening stroll in the wood.
"Master Joe's getting out of training, I fancy," muttered Miles, as though speaking to himself. "I say," he added aloud, "you needn't mention anything to mother about our meeting those men in the wood. They aren't up to any harm, but it might make her more nervous; she gets frightened at anything now."
"But what are they doing?" I asked. "Surely they can't be loitering out there for fun?"
Miles laughed.
"It's fun of a sort," he answered. "I'll tell you some day. Now come on in to supper."
It was one of those hot, still nights when it seems impossible to sleep, and tired though I was with my long ramble in the open air, I lay tossing from side to side, now and again dozing off into an uneasy slumber, only to once more suddenly find myself broad awake. At length, feeling very thirsty, I got up and groped my way across to the washstand for a drink of water. A delicious cool breeze had just begun to come in at the window. I went over and leaned out. The sky was gray and wan with the first pale light of dawn, and the country over which I gazed looked ghostly and strange in the twilight. With my arms folded on the sill, I remained for some time drawing in the fresh morning air in deep breaths, and fascinated by the solemn silence which still reigned over the sleeping world, when to my ear came suddenly an unexpected sound—the clatter of a closing gate.
Wondering who could be about at that early hour, I gazed across the neighbouring field, and so doing saw the figures of two men emerge from the deep shadow of the farthest hedge. At a peculiar jog-trot they crossed the open till a slope in the ground once more hid them from my view. The light was not strong enough to allow of my making out anything beyond the outline of their figures, but it seemed to me that each carried on his back something which I thought resembled a soldier's knapsack. It was impossible, I say, for me to recognize their faces, but following close at the heels of the first I distinctly saw a dog, and immediately decided in my own mind that the man must be Lewis, whom I had seen a few hours before hiding in the wood. What the men could be doing, or whither they were going, I had not the faintest idea, but it struck me that they were up to no good, and that their errand was one which they would not have performed in broad daylight. No other person crossed the field, and at length, greatly perplexed, I returned to bed.
I began to think there were other mysteries to be solved at Coverthorne besides the whereabouts of the secret chamber.