At parting with his father, the young captain received many wise and grave instructions, all of which he resolved to remember and profit by—a resolution which he did not fail to keep for full five minutes.

"Be douce in deportment," said his father, speaking quietly and yet with a certain sternness of demeanour. "Think three times before you give an order, but let no man think even once before obeying it. Set him astraddle the wooden horse with a spear shaft at either foot to teach him that a soldier's first duty is not to think. Keep your eyes more on the alert for the approach of an enemy than for the ankles of the women-folk at the turnings of the turret stairs."

To these and many other maxims out of the incorporate wisdom of the elders, Sholto promised most faithful attendance, and, for the time being, he fully intended to keep his word. But no sooner was his father gone, and he introduced to his new quarters and duties by David Douglas, the Earl's younger brother, than he began to wonder which was the window of Maud Lindesay's chamber and speculate on how soon he would see her thereat.

In the castle of Thrieve that night there was little sleeping room to spare. The Earl and his brother lay wrapped in their plaids in one of the round towers of the outer defences. In the castle hall the retainers of the French ambassador slept side by side, or heads and tails with the archers of the house-guard. Lights flickered on the turnpike stair which led to the upper floors. The servitors had cleared the great hall, and here on a dais, raised above the "marsh" and sheltered by an arras curtain hastily arranged, James the Gross slept on a soft French bed, which he had caused to be brought all the way from his castle of Strathavon on the moors of Lanarkshire.

In the Earl's chamber on the third floor was lodged the Marshal de Retz. Next him ranged the apartment of the countess. Here also was the Lady Sybilla at the end of the passage in the guest chamber which looked to the north, and from the windows of which she could see the broad river dividing itself about the castle island, and flowing as calmly on as if the stern feudal pile had been a peaceful monastery and the waving war banners no more than so many signs of holy cross.

Above, in the low-roofed chambers, which gave upon the wooden balcony, were the apartments of Maud Lindesay and her charge, little Margaret Douglas, the Fair Maid of Galloway.

Now the single postern stair of the castle was shut at the foot, where it opened out upon the hall of the guard by a sparred iron gate, the key of which was put into Sholto's charge. The night closed early upon the castle-ful of wearied folk. The marshals of the camps caused the lights to be put out at nine-of-the-clock in all the tents and pavilions, but the lamps and candles burned longer in the castle itself, where the Earl had been giving a banquet to his guests, of the best that his estates could afford. Nevertheless, it was yet long before midnight when the cheep of the mouse in the wainscot, the restless stir or muffled snore of a crowded sleeper in the guardroom, was the only sound to be heard from dungeon to banner-staff of the great castle.

Sholto's heart throbbed tumultuous and insurgent within him. And small is the wonder. Never in his wildest dreams had he imagined such a fate as this, to be actual captain of the Earl's own body-guard, even though neither title nor emolument was yet wholly his; better still, that he should dwell night and day within arm's reach almost of the desire of his heart, flinty-bosomed and mischievous as she was—these were heights of good fortune to which his imagination had never climbed in its most daring ascents.

No longer did he envy his brother's good fortune, as he had been somewhat inclined to do earlier in the day, when he thought of returning to wield the forehammer all alone in his father's smithy.

The first night of Captain Sholto's responsibility in the castle of Thrieve was destined to be a memorable one. To the youth himself it would have appeared so in any case. Only a panelled door divided him from the girl who, wayward and scornful as she had ever been to him, yet kept his heart dangling at her waist-belt as truly as if it had been the golden key of her armoire.

The ancient Sir John of Abernethy, dubbed Landless Jock, would not be separated from his masters, and slept with two sergeants of the guard in the turret adjacent to that in which the brothers of Douglas, William and David, lay in the first sleep of youth and an easy mind.

Sholto therefore found himself left with the undivided responsibility for the safety of the castle and all who dwelt within it. He was also the only man who, by reason of his charge and in virtue of his master-key, was permitted to circulate freely through all the floors and passages of the vast feudal pile.

Sholto went out to the barred gate of the castle, where in a little cubbyhole dark even at noonday, and black as Egypt now, the warder slept with his hand upon his keys, and his head touching the lever of the gear wherewith he drew the creaking portcullis up and rolled back the iron doors which shut the keep off from the world of the wide outer courtyard and the garrison which manned the turrets.

The porter, Hugh MacCalmont, sat up on his elbow at Sholto's salutation, only enough to see his visitor by the glint of the little iron "cruisie" lamp hanging upon the wall. He knew him by the golden chain of office which the Earl had given Sholto.

"Captain of the guard," he muttered, "Lord, here's advancement indeed. My lord might have remembered me that have served him faithfully these thirty years, opening and shutting without mistake. He might have named me captain of the guard, and not this limber Jack. But the young love the young, and in truth 'tis natural. But what Landless Jock will say when he comes to have this sprat set over him, I know not but I can guess!"

Satisfied that all was safe there, Sholto stepped gingerly over the reclining forms of the first relief guard, who lay wrapped in their cloaks, every man grasping his arms. Most of these were lying in the dead sleep of tired men, whilst others restlessly moved about this way and that, as if seeking an easier adaptation of their bones to the corners of the blue whinstones and rough shell lime than had been provided for when the castle was built by Archibald the Grim, Lord of Thrieve and Galloway.

Close by the last turn of the turret staircase yawned the iron-sparred mouth of the dungeon, in which in its time many a notable prisoner had been immured. It was closed with a huge grid of curved iron bars, each as thick as a man's arm, cunningly held together by a gigantic padlock, the key of which was nightly taken to the sleeping-room of the Earl—whether, as was now the case, the cell stood empty, or whether it contained an English lord waiting ransom or a rebellious baron expectant of his morning summons to the dule tree of the Black Douglas.

Then taking the master-key from his belt, Sholto unlocked the sparred gate leading from the salle de garde into the turret stair which was the sole communication with the upper floors of the castle.

Slowly, and with a step no louder than the beating of his own heart, he went upwards, glancing in midway upon the banquet hall, where the dim light from the postern without revealed a number of dark forms wrapped in slumber lying on the dining-table and on the floor; ascending yet higher he came to the floor where slept the Countess of Douglas, the Lady Sybilla, and in the Earl's own chamber the Marshal de Retz, ambassador of the King of France.

Sholto stood a moment with his hand raised in a listening attitude, before he ventured to ascend those narrower stairs which led to the uppermost floor of all, on which were the chambers occupied by the little Maid Margaret and her companion and gossip Mistress Maud Lindesay.

He told himself that it was his duty to see to the safety of the whole castle; that he had special instructions to visit three times, during the course of each night of duty, all the passages and corridors of the fortress. But nevertheless it needed all his courage to enable Sholto to perform the task which had been laid upon him. As he dragged one foot after the other up the turret stairs, it seemed as if a leaden clog had been attached to each pointed shoe.

He had also a vague sense of being watched by presences invisible to him, but malign in their nature. Again and again he caught himself listening for footsteps which seemed to dog his own. He heard mysterious whisperings that flouted his utmost vigilance, and mocking laughter that lurked in unseen crevices and broke out so soon as he had passed.

Sholto set his hand firmly upon his sword handle and bit his lips, lest even to himself he should own his uneasiness. It was not seemly that the captain of the Douglas guard should be frightened by shadows.

Passing the corridor which led towards the sleeping rooms of the maid and her companion, he ascended to the roof of the castle, thrusting aside the turret door and issuing upon the wide, open spaces with an assured step. The cool breeze from the west restored him to himself in a moment. The waning moon cast a pale light across the landscape, and he could see the tents on the castle island glimmer greyish white beneath him. Beyond that again was the shining confluence of the sluggish river about the isle, and the dark line of the woods of Balmaghie opposite. He had begun to meditate on the rapid changes of circumstance which had overtaken him, when suddenly a shrill and piercing shriek rang out, coming up through the castle beneath, again and again repeated. It was like the cry of a child in the grip of instant and deadly terror.

Sholto's heart gave a great bound. That something untoward should happen on this the first night of his charge was too disastrous. He drew his sword and set in his lips the silver call which depended from the chain of office the Earl had thrown about his neck when he made him captain of his guard.

His feet hardly touched the stone stairs as he flew downwards, and wings were added to his haste by the sounds of fear which continued to increase. In another moment he was upon the last step of the turnpike and at the entrance of the corridor which led to the rooms of the little Lady Margaret and Maud Lindesay.

As Sholto came rushing down the steep descent from the roof he caught sight of a dark and shaggy beast running on all fours just turning out of the corridor, and taking the first step of the descent towards the floor beneath. Without pausing to consider, Sholto lunged forward with all his might, and his sword struck the fugitive quadruped behind the shoulder. He had time to see in the pale bluish flicker of the cruisie lamp that the beast he had wounded was of a dark colour, and that its head seemed immensely too large for its body.

Nevertheless, the thing did not fall, but ran on and vanished out of Sholto's sight. The young man again set the silver call to his lips and blew. The next moment he could hear the soldiers of the guard clattering upward from their hall, and he himself ran along the corridor towards the place whence the screams of terror seemed to proceed.