Such was our simple, uneventful existence, until the summer night when an unlooked-for incident occurred which proved to be the herald of those strange doings which I have taken up my pen to describe.

It had been my habit to pull out of an evening in the laird's skiff and to catch a few whiting which might serve for our supper. On this well-remembered occasion my sister came with me, sitting with her book in the stern-sheets of the boat, while I hung my lines over the bows.

The sun had sunk down behind the rugged Irish coast, but a long bank of flushed cloud still marked the spot, and cast a glory upon the waters. The whole broad ocean was seamed and scarred with crimson streaks. I had risen in the boat, and was gazing round in delight at the broad panorama of shore and sea and sky, when my sister plucked at my sleeve with a little, sharp cry of surprise.

“See, John,” she cried, “there is a light in Cloomber Tower!”

I turned my head and stared back at the tall, white turret which peeped out above the belt of trees. As I gazed I distinctly saw at one of the windows the glint of a light, which suddenly vanished, and then shone out once more from another higher up. There it flickered for some time, and finally flashed past two successive windows underneath before the trees obscured our view of it. It was clear that some one bearing a lamp or a candle had climbed up the tower stairs and had then returned into the body of the house.

“Who in the world can it be?” I exclaimed, speaking rather to myself than to Esther, for I could see by the surprise upon her face that she had no solution to offer. “Maybe some of the folk from Branksome-Bere have wanted to look over the place.”

My sister shook her head.

“There is not one of them would dare to set foot within the avenue gates,” she said. “Besides, John, the keys are kept by the house-agent at Wigtown. Were they ever so curious, none of our people could find their way in.”

When I reflected upon the massive door and ponderous shutters which guarded the lower storey of Cloomber, I could not but admit the force of my sister's objection. The untimely visitor must either have used considerable violence in order to force his way in, or he must have obtained possession of the keys.

Piqued by the little mystery, I pulled for the beach, with the determination to see for myself who the intruder might be, and what were his intentions. Leaving my sister at Branksome, and summoning Seth Jamieson, an old man-o'-war's-man and one of the stoutest of the fishermen, I set off across the moor with him through the gathering darkness.