“Near a small village in this country,” I read, “called Gavon, the moon at midnight is said to shine through a certain gap or fissure in a wall of rock close beside the river on to the ruins of a Pict castle, so that the light of its beams falls on to a large flat stone erected there near the gate, and supposed by some to be an ancient and pagan altar. At that moment, so the superstition still lingers in the country side, the evil and malignant spirits which hold sway on Gavon’s Eve, are at the zenith of their powers, and those who invoke their aid at this moment and in this place, will, though with infinite peril to their immortal souls, get all that they desire of them.”
The paragraph on the subject ended here, and I shut the book.
“Well?” I asked.
“Under favourable circumstances two and two make four,” said Hugh.
“And four means——”
“This. Sandy is certainly in consultation with a woman who is supposed to be a witch, whose path no crofter will cross after nightfall. He wants to learn, at whatever cost, poor devil, what happened to Catrine. Thus I think it more than possible that to-morrow, at midnight, there will be folk by the Picts’ pool. There is another curious thing. I was fishing there yesterday, and just opposite the river gate of the castle, someone has set up a great flat stone, which has been dragged (for I noticed the crushed grass) from the débris at the bottom of the slope.”
“You mean that the old hag is going to try to raise the body of Catrine, if she is dead?”
“Yes, and I mean to see myself what happens. Come too.”
The next day Hugh and I fished down the river from the lodge, taking with us not Sandy, but another gillie, and ate our lunch on the slope of the Picts’ Castle after landing a couple of fish there. Even as Hugh had said, a great flat slab of stone had been dragged on to the platform outside the river gate of the castle, where it rested on certain rude supports, which, now that it was in place, seemed certainly designed to receive it. It was also exactly opposite that lancet window in the basaltic rock across the pool, so that if the moon at midnight did shine through it, the light would fall on the stone. This then was the almost certain scene of the incantations.
Below the platform, as I have said, the ground fell rapidly away to the level of the pool, which owing to rain on the hills was running very high, and, streaked with lines of greyish bubbles, poured down in amazing and ear-filling volume. But directly underneath the steep escarpment of rock on the far side of the pool it lay foamless and black, a still backwater of great depth. Above the altar-like erection again the ground rose up seven rough-hewn steps to the gate itself, on each side of which, to the height of about four feet, ran the circular wall of the castle. Inside again were the remains of partition walls between the three chambers, and it was in the one nearest to the river gate that we determined to conceal ourselves that night. From there, should the witch and Sandy keep tryst at the altar, any sound of movement would reach us, and through the aperture of the gate itself we could see, concealed in the shadow of the wall, whatever took place at the altar or down below at the pool. The lodge, finally, was but a short ten minutes away, if one went in the direct line, so that by starting at a quarter to twelve that night, we could enter the Picts’ Castle by the gate away from the river, thus not betraying our presence to those who might be waiting for the moment when the moon should shine through the lancet window in the wall of rock on to the altar in front of the river gate.