The local features and scenery of these isles, torn as they were by convulsions of nature into deep gorges covered with bosky thickets, or invaded by abrupt cliffs and bluffs, made the operations of the troops, who were cross-belted for weeks consecutively, severe and harassing. The hardihood and power of endurance which are characteristic of the Scottish Highlanders, rendered the Black Watch of the greatest service, while, on the other band, the cavalry of the expedition were soon totally unfit for duty, and the 28th Light Dragoons gradually disappeared altogether.

"St. Lucia presents a chequered scene of sombre forests and fertile valleys, smiling plains and towering precipices, shallow rivers and deep ravines;" but the chief of all its hills are the huge pyramidal Pitons, two sugar-loaf shaped masses of rock, which from their base in the blue ocean to their summits in the sky are ever covered with waving foliage of the most brilliant green. The steep and rugged nature of the country and its pathless woods, where of old the painted Carib lurked, presented innumerable difficulties to the soldiers and seamen, who had to drag the battering guns from the beach into position against Morne Fortunée; but on the 17th May a sufficient number were in readiness to open a fire against the Vizie, or fortified ridge, which had been strengthened by palisades, earthworks, and bastions of stone, on which the French had mounted some of their heaviest guns.

It was proposed to undermine one of these bastions, and Evan MacPherson, who had volunteered for the engineering department, discovered—no one knew how—an arched place almost immediately under it; and he at once resolved to turn this vault to the best advantage. It was small and domed with stone, having been an oratory hewn out of the hill-side in the days of the Sieur de Rousselan, a French Governor of St. Lucia, who died in 1654, and who was much beloved for his gentleness even by the fierce Caribs, one of whose women he had married.

Here, for three nights preceding the seventeenth of May, the Captain Dhu, with ten soldiers of the 27th Regiment, worked to lay a mine, which, when fired, would blow the whole upper work, with its men, cannon and shot into the air. In the dark they crept to and fro on their hands and knees, reaching the place unmolested it is true, but not unseen; for on the third night they were attacked by the French, and a terrible close combat with bayonets and pistols took place in the dark. Most of MacPherson's men were slain and cruelly butchered by the infuriated French; but him they could neither kill, capture, overcome, or drive out of the vault.

Plying his broadsword with both hands, he swept aside the charged bayonets and clubbed muskets like dry reeds by a winter brook; the wounds he inflicted were terrible! Lights were now brought, and in the red blaze of torches, and the ghastly green glare of fire-balls, his tall and muscular form was seen towering over a pile of fallen men who encumbered the slippery and gory floor, towering like an infernal spirit or destroying angel, his sword-blade and his eyes flashing together, his swarthy cheek a deep red, and his black hair waving in elf-like locks.

"C'est le diable!" exclaimed the French, and precipitately retired, leaving the vault, but only to adopt measures more sorely to destroy him. Piles of straw, damp hemp, tar-barrels, and powder were flung in. Then fire was applied, and thus all the miserable wounded were suffocated or burned alive, with the corpses of the dead. Even the Captain Dhu did not come forth after this; and at midnight his regiment, with the 27th or Inniskillings, and the 31st or Huntingdonshire Foot, commenced the attack on the fortified ridge of the Vizie without him; and his company was led by Lieutenant Simon Frazer, who was afterwards so severely wounded at the capture of St. Vincent.

Six days the fighting continued, and an unceasing fire was exchanged between the British battery and the fort, until the 27th Regiment, by a desperate exertion of bravery, effected a lodgment within five hundred yards of the French works, where they repulsed a furious sortie of the enemy, and maintained their ground almost over the very place where the miners had been destroyed. This movement proving successful, the French capitulated on the twenty-sixth May, and from that day the Isle of St. Lucia became a British colony, after the loss of one hundred and ninety-four officers and men killed, and five hundred and fifty-four wounded, according to the nominal return; but that document was in error by one; for among those returned as slain six days before the capitulation, was the Captain Dhu.

When the interment of the dead took place, the fatal mine was explored, and it presented a dreadful scene, being full of dead soldiers, half scorched, roasted, decomposed, and covered with black festering wounds, while the pavement was so slippery with blood and hideous slime, that the fatigue party could scarcely bear out the remains of their comrades to their hastily-made graves under the fatal guns of Morne Fortunée.

The 27th found old Bill Hook, the corporal of their Pioneers, literally burned to a mere piece of charcoal; and the remains were alone identified by a brass tobacco-box which the deceased was known to possess.

One body, fearfully blackened by smoke, and having the uniform scorched off it, a sword in its fingers calcined by the fire to a mere stripe of rusty iron, was borne out and laid upon the grass in the bright sunshine; and then with a shout of astonishment old Hamish Grant and others recognised the famous Captain Dhu!