During the summer months it was the custom for Katreen and two of the farm-girls to go up Maol-Ranza, to reside at the shealing of Cnoc-an-Fhraoch: and this because of the hill-pasture for the sheep.

Cnoc-an-Fhraoch is a round, boulder-studded hill covered with heather, which has a precipitous corrie on each side, and in front slopes down to Lochan Fraoch, a lochlet surrounded by dark woods. Behind the hill, or great hillock rather, lay the shealing. At each weekend Katreen went down to Ramza-Mr, and on every Monday morning at sunrise returned to her heather-girt eerie. It was on one of these visits that she endured a cruel shock. Her father told her that she must marry some one else than Sheumais Achanna. He had heard words about him which made a union impossible, and indeed, he hoped that the man would leave Ranza-beag. In the end he admitted that what he had heard was to the effect that Achanna was under a doom of some kind, that he was involved in a blood-feud; and, moreover, that he was fey. The old man would not be explicit as to the person from whom his information came, but hinted that he was a stranger of rank, probably a laird of the isles. Besides this, there was word of Ian Macarthur. He was at Thurso, in the far north, and would be in Skye before long, and he--her father--had written to him that he might wed Katreen as soon as was practicable.

"Do you see that lintie yonder, father?" was her response to this.

"Ay, la.s.s, and what about the birdeen?"

"Well, when she mates with a hawk, so will I be mating with Ian Macarthur, but not till then."

With that she turned and left the house, and went back to Cnoc-an-Fhraoch. On the way she met Achanna.

It was that night that for the first time he swam across Lochan Fraoch to meet Katreen.

The quickest way to reach the shealing was to row across the lochlet, and then ascend by a sheep-path that wound through the hazel copses at the base of the hill. Fully half an hour was thus saved, because of the steepness of the precipitous corries to right and left. A boat was kept for this purpose, but it was fastened to a sh.o.r.e boulder by a padlocked iron chain, the key of which was kept by Donald Macarthur. Latterly he had refused to let this key out of his possession. For one thing, no doubt, he believed he could thus restrain Achanna from visiting his daughter. The young man could not approach the shealing from either side without being seen.

But that night, soon after the moon was whitening slow in the dark, Katreen stole down to the hazel copse and awaited the coming of her lover. The lochan was visible from almost any point on Cnoc-an-Fhraoch, as well as from the south side. To cross it in a boat unseen, if any watcher were near, would be impossible, nor could even a swimmer hope to escape notice unless in the gloom of night or, mayhap, in the dusk.

When, however, she saw, half-way across the water, a spray of green branches slowly moving athwart the surface, she new that Sheumais was keeping his tryst. If, perchance, any one else saw, he or she would never guess that those derelict rowan branches shrouded Sheumais Achanna.

It was not till the estray had drifted close to the hedge, where, hid among the bracken and the hazel undergrowth, she awaited him, that Katreen descried the face of her lover, as with one hand he parted the green sprays, and stared longingly and lovingly at the figure he could just discern in the dim, fragrant obscurity.

And as it was this night so was it many of the nights that followed.

Katreen spent the days as in a dream. Not even the news of her cousin Ian's return disturbed her much.

One day the inevitable meeting came. She was at Ranza-Mr, and when a shadow came into the dairy where she was standing she looked up, and saw Ian before her. She thought he appeared taller and stronger than ever, though still not so tall as Sheumais, who would appear slim beside the Herculean Skyeman. But as she looked at his close curling black hair and thick bull-neck and the sullen eyes in his dark wind-red face, she wondered that she had ever tolerated him at all.

He broke the ice at once.

"Tell me, Katreen, are you glad to see me back again?"

"I am glad that you are home once more safe and sound."

"And will you make it my home for me by coming to live with me, as I've asked you again and again?"

"No: as I've told you again and again."

He gloomed at her angrily for a few moments before he resumed.

"I will be asking you this one thing, Katreen, daughter of my father's brother: do you love that man Achanna who lives at Ranza-beag?"

"You may ask the wind why it is from the east or the west, but it won't tell you. You're not the wind's master."

"If you think I will let this man take you away from me, you are thinking a foolish thing."

"And you saying a foolisher."

"Ay?"

"Ah, sure. What could you do, Ian Mhic Ian? At the worst, you could do no more than kill James Achanna. What then? I too would die. You cannot separate us. I would not marry you, now, though you were the last man in the world and I the last woman."

"You are a fool, Katreen Macarthur. Your father has promised you to me, and I tell you this: if you love Achanna you'll save his life only by letting him go away from here. I promise you he will not be here long."

"Ah, you promise _me_; but you will not say that thing to James Achanna's face. You are a coward."

With a muttered oath the man turned on his heel.

"Let him beware o' me, and you, too, Katreen-mo-nighean-donn. I swear it by my mother's grave and by St. Martin's Cross that you will be mine by hook or by crook."

The girl smiled scornfully. Slowly she lifted a milk-pail.

"It would be a pity to waste the good milk, Ian-grach, but if you don't go it is I that will be emptying the pail on you, and then you will be as white without as your heart is within."

"So you call me witless, do you? _Ian-grach!_ Well, we shall be seeing as to that. And as for the milk, there will be more than milk spilt because of _you_, Katreen-donn."

From that day, though neither Sheumais nor Katreen knew of it, a watch was set upon Achanna.

It could not be long before their secret was discovered, and it was with a savage joy overmastering his sullen rage that Ian Macarthur knew himself the discoverer, and conceived his double vengeance. He dreamed, gloatingly, on both the black thoughts that roamed like ravenous beasts through the solitudes of his heart. But he did not dream that another man was filled with hate because of Katreen's lover, another man who had sworn to make her his own, the man who, disguised, was known in Armandale as Donald McLean, and in the north isles would have been hailed as Gloom Achanna.

There had been steady rain for three days, with a cold, raw wind. On the fourth the sun shone, and set in peace. An evening of quiet beauty followed, warm, fragrant, dusky from the absence of moon or star, though the thin veils of mist promised to disperse as the night grew.

There were two men that eve in the undergrowth on the south side of the lochlet. Sheumais had come earlier than his wont. Impatient for the dusk, he could scarce await the waning of the afterglow; surely, he thought, he might venture. Suddenly his ears caught the sound of cautious footsteps. Could it be old Donald, perhaps with some inkling of the way in which his daughter saw her lover in despite of all; or, mayhap, might it be Ian Macarthur, tracking him as a hunter stalking a stag by the water-pools? He crouched, and waited. In a few minutes he saw Ian carefully picking his way. The man stopped as he descried the green branches; smiled as, with a low rustling, he raised them from the ground.

Meanwhile yet another man watched and waited, though on the farther side of the lochan, where the hazel copses were. Gloom Achanna half hoped, half feared the approach of Katreen. It would be sweet to see her again, sweet to slay her lover before her eyes, brother to him though he was.

But, there was chance that she might descry him, and, whether recognizingly or not, warn the swimmer.

So it was that he had come there before sundown, and now lay crouched among the bracken underneath a projecting mossy ledge close upon the water, where it could scarce be that she or any should see him.

As the gloaming deepened a great stillness reigned. There was no breath of wind. A scarce audible sigh prevailed among the spires of the heather. The churring of a night-jar throbbed through the darkness.

Somewhere a corncrake called its monotonous _crek-craik_; the dull, harsh sound emphasizing the utter stillness. The pinging of the gnats hovering over and among the sedges made an incessant murmur through the warm, sultry air.

There was a splash once as of a fish. Then, silence. Then a lower but more continuous splash, or rather wash of water. A slow _susurrus_ rustled through the dark.

Where he lay among the fern Gloom Achanna slowly raised his head, stared through the shadows and listened intently. If Katreen were waiting there she was not near.

Noiselessly he slid into the water. When he rose it was under a clump of green branches. These he had cut and secured three hours before. With his left hand he swam slowly, or kept his equipoise in the water; with his right he guided the heavy rowan bough. In his mouth were two objects, one long and thin and dark, the other with an occasional glitter as of a dead fish.

His motion was scarcely perceptible. None the less he was near the middle of the loch almost as soon as another clump of green branches.

Doubtless the swimmer beneath it was confident that he was now safe from observation.

The two clumps of green branches drew nearer. The smaller seemed a mere estray, a spray blown down by the recent gale. But all at once the larger clump jerked awkwardly and stopped. Simultaneously a strange, low strain of music came from the other.

The strain ceased. The two clumps of green branches remained motionless.

Slowly, at last, the larger moved forward. It was too dark for the swimmer to see if any one lay hid behind the smaller. When he reached it he thrust aside the leaves.

It was as though a great salmon leaped. There was a splash, and a narrow, dark body shot through the gloom. At the end of it something gleamed. Then suddenly there was a savage struggle. The inanimate green branches tore this way and that, and surged and swirled. Gasping cries came from the leaves. Again and again the gleaming thing leaped. At the third leap an awful scream shrilled through the silence. The echo of it wailed thrice, with horrible distinctness, in the corrie beyond Cnoc-an-Fhraoch. Then, after a faint splashing, there was silence once more. One clump of green branches drifted slowly up the lochlet. The other moved steadily toward the place whence, a brief while before, it had stirred.

Only one thing lived in the heart of Gloom Achanna--the joy of his exultation. He had killed his brother Sheumais. He had always hated him because of his beauty; of late he had hated him because he had stood between him, Gloom, and Katreen Macarthur--because he had become her lover. They were all dead now except himself, all the Achannas. He was "Achanna." When the day came that he would go back to Galloway, there would be a magpie on the first birk, and a screaming jay on the first rowan, and a croaking raven on the first fir; ay, he would be their suffering, though they knew nothing of him meanwhile! He would be Achanna of Achanna again. Let those who would stand in his way beware.

As for Katreen: perhaps he would take her there, perhaps not. He smiled.

These thoughts were the wandering fires in his brain while he slowly swam sh.o.r.eward under the floating green branches, and as he disengaged himself from them and crawled upward through the bracken. It was at this moment that a third man entered the water from the further sh.o.r.e.