The quantity of powder used in the explosion of Fort Nicholas was 50,000 kilogrammes, or 100,000 French pounds. Double that quantity was found under the fort when the engineers commenced their operations. This was not the only concealed store of powder the French discovered in their part of Sebastopol. The intention was that all the mines should explode simultaneously, and that they did not do so was attributable to some fault in Beckford's fuse, known among the French as le cordon Anglais. The effect, however, was very fine, and nothing could be more complete than the destruction. The operations against the docks may be said to have commenced at the end of November, for although a beginning was made at an earlier period, the works were quickly suspended, and resumed only at the above date. The French did their work in four explosions; the English had six, besides minor ones of small extent.

Fort Alexander was blown up, in three explosions, at one o'clock on February 11th. The destruction was complete, but the place did not look such a perfect level as the site of Fort Nicholas, and the sea face was intentionally left standing. The day was dry, but not bright, and the absence of sun detracted from the striking nature of the spectacle, which was, however, sufficiently imposing, but not equal to that of Fort Nicholas's downfall. The Russians, who had been firing a little from the Inkerman Batteries just before the fort blew up, were perfectly silent for some time after the explosion, apparently thinking it more dignified to contemplate the destruction of their fortresses calmly than to exhibit impotent wrath and to expend their ammunition unprofitably. At a later period of the day they fired more than usual from the north side.

A stroll about the environs of Sebastopol, and the sight of the enormous cannon-balls and fragments of monster shells that strew the ground in all directions, impressed one with a respectful idea of the power of powder; but the respect was vastly increased by a view of the havoc it played in such stupendous works as the docks—structures formed to last for ages, and to the duration of which no limit could be assigned. The difficulty of destruction was enhanced in the case of the docks allotted to the English by the fact that these were in part hewn out of solid rock. The basin thus formed was lined with huge masses of stone, and between rock and stone earth was filled in. The engineers availed themselves of the soft interval for their mines, and blew the walls and counterforts inwards, but the rock remains, marking in places the outline of the docks. The counterforts were of prodigious strength and thickness. Then there was a deep covered drain outside the docks, for the purpose of emptying them when desired, of which the engineers, of course, made use. Greatly incommoded at first by the water that flowed down the ravine in their rear, they overcame this difficulty at no small expense of labour. Their mode of operating against the docks varied according to circumstances, but seems to have consisted in a great measure of regular mines, with shaft and gallery. Two of these shafts down which I looked were about thirty feet deep. The engineers had blown up the eastern pier, or extremity of that side of the dock, to which a gate was attached—one of the jaws of the dock; and this explosion seems to have been as complete in its effect as any that have taken place. The huge mass was lifted up and dislocated, and the enormous transverse beams, masses of black timber of incalculable strength, were torn from their fastenings, snapped in twain, and remained with their splintered ends resting against each other, in the shape of a house-roof. Below the pointed arch thus formed was a black chasm, and heaped around, piles of stone and dusty ruins. Everything was removed and riven without being scattered; and this was the object at which our engineers constantly aimed. They sought all along, and generally with much success, so to proportion the charges of their mines that, while everything should be overturned, rooted out, and thrown into the utmost confusion (literally topsyturvy), as little as possible should be thrown out of the crater. And accordingly most of their explosions had not the appearance which would popularly be anticipated from the letting off of two, three, or more thousand pounds of powder. There was no diverging gush of stones, but a sort of rumbling convulsion of the ground; a few blocks and fragments were cast up to a moderate height, but the effect upon the spectator was that of some gigantic subterranean hand just pushing the masses a short distance out of their places, turning them upside down, and rolling them over each other in a cloud of smoke and dust.

GRAND REVIEW.

On the 25th of February 25,000 of our infantry were there assembled for inspection and review by the Commander-in-Chief, and the bayonets of forty-six British battalions bristled upon Telegraph Hill, overlooking the valley of the Tchernaya. The morning was so cold, that some who impatiently awaited the spectacle feared it would be again postponed, but the earth and air were dry, and after church service the divisions were seen marching from their camps in the direction of the parade-ground. As the troops marched up, the pioneers busied themselves with filling the small circular trenches where tents had formerly stood; and, when the review was over, the whole surface had been trodden by hoof and foot as level as a bowling-green.

Those English officers, of various arms and departments, whom duty did not call out or keep in, flocked in hundreds to witness the review of a larger number of British troops than has been held for forty years. There was every variety of French and Sardinian and even Spanish uniform. Marshal Pelissier came on the ground in his carriage and four, by which is not to be understood a handsome vehicle and showy team, with well-kept harness and neat postilions—but a very rough, nearly paintless drag, with harness partly of rope, horses that matched the carriage as regards roughness, and soldiers in artillery saddles on the near wheeler and leader. His little escort of Chasseurs contrasted with the English Hussars who followed Sir William Codrington. Marshal Pelissier alighted from his carriage, and took his station at the foot of a hillock, opposite the centre of the line, of the whole of which he then commanded a good view. The array of the troops was nearly completed when a shell was seen to burst high in the air above the valley of the Tchernaya. Our Russian friends politely informed us that they were present and attentive, reckoning that we should see their messenger, though they could not expect him to reach us.

The line was formed in continuous columns of companies, with intervals of six paces between each regiment. Its face was towards the Russian positions beyond the valley. On the right were the Guards and the regiments forming the First Division; then came the Highlanders; then the Second, Third, and Fourth Divisions; and finally the Light Division. When the inspection was completed, General Codrington took up his station in front, to the right of the knoll where Marshal Pelissier was posted, and the troops marched past in open column. The Guards came by, of course with their own favourite tune, "The British Grenadiers;" the pipes of the Highlanders squeaked, squealed, and droned forth that strange combination of sounds so dear to Scotch ears, and so discordant to those of Saxon or Gaul; one brigade marched on to "Partant pour la Syrie," in compliment to the French.

The Second Brigade of the Fourth Division had one of the best bands, and played a spirited march, but, generally speaking, the music of this army had not recovered the losses of the war. The troops marched past in front of the ground on which they had just stood in line. The morning had been grey and dull up to the commencement of the review, but the clouds then grew thinner and dispersed a little, and a few fitful gleams of sunshine shone upon British legions as they descended the slope in most perfect order, a broad steady torrent of bayonets, not rapid but irresistible. A finer military sight could hardly be seen than was presented by that matchless infantry. The healthy appearance of the men testified to good keep and much care taken of them; their soldierly carriage and perfect dressing proved that their officers had profited by the unusually fine and open winter to hasten the military education of the numerous recruits.

The Rifles were much praised by the foreign officers. Many were the tattered and shot-rent banners borne by. The colours of the 23rd Fusiliers were like a sieve, pierced with countless bullets, and telling the eloquent and bloody tale of the Alma and of Inkerman. Those of the 77th and 97th were much riddled, and many regiments were fain to keep their banners furled, their torn condition not allowing of their display to the breeze. The whole of the troops having marched past in open column, formed up at some distance to the north of Telegraph Hill, on lower ground, nearer to the camp, and thither General Codrington proceeded. People were chilled with sitting still on their horses, and delighted to get a canter; the ground was good, the air fresh, the opportunity tempting, and away went high mettled English chargers, fleet Arabs, and tough Turkish and Tartar ponies at a smart pace. The field was a large one, and two or three small ditches towards the end of the course gave animation to the chase, until at last the General was run to earth, hard by where sat the French Marshal in his carriage, and all passed up to witness the second défilé, which was in close column. After this the divisions marched straight away to their various camps, and the country on all sides was seen thickly sprinkled with horsemen cantering homewards, bent, in most cases, on taking to themselves something of a warming nature, for the cold had really been sharp, and no speculative canteen-man had thought of sending emissaries with well-lined baskets to the scene of the review.

When all was over, Marshal Pelissier went up to General Codrington, and complimented him in the highest terms on the appearance of his troops. The numbers on parade would have been considerably larger had the whole of our effective infantry turned out, but General Warren's brigade, stationed at Balaklava, was not ordered up, neither were the 72nd Highlanders and the two battalions of the 1st Royals, which were encamped some way beyond Kamara; and then there was the garrison of Sebastopol, and the Redan picket, camp guards, &c.; so that, altogether, there were many battalions and parts of battalions absent. It was purely an infantry review—no artillery, nor cavalry, save the handful of Hussars employed in escorting the General and keeping the ground.