So poor little Murielle found Thrave with all its splendour, a veritable prison, and the earl, her brother-in-law, a haughty and exacting tyrant.
Thrave, his greatest stronghold, was built upon an island of twenty acres in extent, formed by the rough and rapid Dee, situated about ten miles above its estuary, and thirty from its source, which is among the wooded hills of Minnigaff.
There on that islet the crusader Alan IV., lord of Galloway and constable of Scotland, had a fortress, and thereon, in after times, the Black Knight of Liddesdale, the comrade of Wallace and Bruce, reared the present castle of Thrave, a vast pile, the donjon of which is yet seventy feet in height, with walls eight feet in thickness, built of common stone from the adjacent moors.
The first story of this great pile consisted of the larder, the arsenals, and the dungeon, where many a chained wretch has wept during the hours that intervened between time and eternity.
In the second story were the apartments of the men-at-arms, the warders, grooms, and pages.
The third contained the apartments of the baron, his family, their guests, and the ladies' bower-chamber, with one apartment long secluded, that in which Archibald, earl of Douglas and lord of Galloway,—he whose second son won by his valour the titles of duke of Spruce and prince of Dantzig, died on the 3rd of February, 1400. Small Gothic windows gave light to these upper chambers, and narrow slits and loopholes to the lower.
A square barbican and four round flanking towers, with a deep fosse and drawbridge, formed the external barrier. After passing these, the only entrance to the keep was by a door placed so high in the wall that it opened on the second floor, and this strange mode of access was farther secured by a small portcullis, grooved into the solid stone, the work of "the Brawny MacKim," the hereditary smith of the family.
To victual this stronghold each of the twenty-eight parishes which form the stewardry of Kirkcudbright had to contribute a Lardner-mart-cow at Martinmas, for winter provisions; and the last attempt to levy these twenty-eight cattle was made in 1747, by William Maxwell, of Nithsdale.
In the front wall of the great tower, and immediately above the gateway, which bore all the armorial achievements of the proud and lordly owners, there still projects a large granite block, named the gallows knob, or hanging-stone, which, in the olden time, was seldom without its tassel, as the moss-troopers phrased it.
"Lest this barbarous emblem of feudal power should be minus its usual decoration," says a local historian, "when putrefaction became offensive before the corpse was cut down, if a malefactor was not in custody to be tucked up, it was replenished by some unoffending vassal. The charnel into which these victims were thrown is to this day named the 'gallows slot,' and notwithstanding the time that has elapsed since the downfall of the house of Douglas in Galloway, human bones in abundance were turned up when the present highway was made through it there in the year 1800."