So, through the month of July and the beginning of August, these deadly labours were continued, and the Allies crept nearer and nearer to the Malakoff and the Redans, and to the ramparts on the western face. In the meantime came reports that the Russian Government, determined to strike one blow for victory, had directed several divisions from Poland towards the Crimea. These reports were true. An effort was about to be made to raise the siege. As no attack could be made from the head of the harbour, it was plain that the covering army would be assailed from the Heights of Mackenzie and the Valley of Chouliou; wherefore the Sardinian infantry from Tchorgoun made several excursions into the hilly region to the north-east, yet they found no enemy. The Turks also entered the mountains, and the French cavalry in the Baidar Valley kept an eye on all the rugged passes leading into that fertile spot. They found no enemies in force, and they obtained from the valley a boundless supply of forage. But in the beginning of August it was observed that the Russians were constructing new works on the road from the Tchernaya to the Heights of Mackenzie, at points whence they could fire into the front and flanks of an advancing column. Clusters of Cossacks came down more frequently to the brow of the hills, gazed curiously into the valley, and sometimes skirmished with the French outposts. Small parties of the same useful troops hung about the French cavalry camps in the Baidar Valley, and one or two were caught by the active Chasseurs d'Afrique. From the end of the first week in August the Allies were on the look-out for an assault in force upon the Tchernaya.

It was the fact that Prince Gortschakoff, having received large reinforcements, in obedience to orders from St. Petersburg—for the Emperor on the Neva, like the Emperor on the Seine, interfered in the conduct of the war—proposed to assail the Allies. He was painfully aware of the strength of their position. He knew the ground. It had long been visible to him throughout its whole extent. He could see the Sardinian entrenchments from the heights above Tchorgoun, and his very batteries could almost reach the French camps from the heights of Inkermann. He had two batteries, called by the French Gringalet and Bilboquet, upon these heights, whose missiles amused the French outposts, and sometimes annoyed them, but seldom did any harm. Knowing the ground well, and the strength of the force holding it, he designed a clever plan of attack, based on that knowledge, but depending entirely for success upon a surprise, followed by rapid movements urged on without hesitation.

The French were encamped on the crown of the Fedoukine hills. Their outposts on the left, or western side, were on the banks of the Tchernaya, and they held an angular entrenchment or redan on the right bank, to defend the access to the bridge. The valley in front of the French camps, looking north, was a meadowy plain, through which ran the road to the Heights of Mackenzie and Inkermann. The troops occupying this position were seven battalions of Turks, with four guns, whose duty it was to watch the ford of Alsou, and guard the course of the Tchernaya thence to the confluence of the Kreuzen, having ten battalions in support near Kamara, on the other side of the affluent. Next, the Sardinians under La Marmora, consisting of the divisions of Durando and Trotti, encamped on the Hasfort Hill, and in the plain the cavalry under Saviroux. The Sardinians had thirty guns, and a British battery of position, 32-pounder howitzers, under Captain Mowbray. Then came the three French divisions—that of Fancheux on the right, that of Herbillon in the centre, that of Camou on the left. The French cavalry, Morris's division, were encamped in the plain on the left of the Sardinians. The artillery park was in the rear of the Fedoukine heights. General Herbillon commanded the whole. Five brigades held the heights, and one occupied the eastern slopes of Mount Sapoune, and thus connected the army of observation with the corps engaged in pushing the attacks against the Malakoff. Including the British cavalry, 3,000 strong, there were nearly 40,000 men and 120 guns in line between Alsou and Mount Sapoune.

The information brought in by our spies and the reports of deserters had led the allied generals to look either for a sortie from the town, or for an attack on the line of the Tchernaya. On the 14th of August the troops in camp were under arms before daybreak, but nothing occurred on one side or the other. On the 15th more positive news arrived. General d'Allonville from the Baidar Valley notified by the semaphore that he had troops in front of him, or rather that his patrols had discovered bodies of the enemy moving down into the Valley of Chouliou. Signal lights flashed from Mackenzie to Inkermann, and from Inkermann to Sebastopol. An ostentatious gathering of troops in rear of the Redan and Malakoff was discovered from the tops of our men-of-war, and at the same time a suspicious movement of Russians towards Inkermann. All the commanders were warned, and orders were issued to be more than usually vigilant; General La Marmora directing his brigades to get under arms before daylight the next morning.

Prince Gortschakoff had, indeed, resolved to surprise if he could, if not, to force, the line of the Tchernaya. His reinforcements consisted of the 4th, 5th, and 7th divisions of infantry. To these he was able to add the 17th, 12th, 6th, and 11th; of these the 11th, 12th, and 17th had long been in the Crimea, and had fought at the Alma and Inkermann; but the 4th, 5th, 6th, and 7th were fresh troops, which had arrived recently from Poland and Bessarabia. In fact, as soon as it was certain that Austria did not mean to fight, the Czar put in motion all the troops that could be spared from the Austrian frontiers. Had all these divisions been in full strength, Prince Gortschakoff could have brought into line 78,000 infantry alone. But long marches had weakened some regiments, and others had suffered great losses in the field and the trenches; and instead of 78,000, he could only dispose of 50,900 infantry. To support them he had 7,200 cavalry, chiefly regulars, and 262 guns; in all about 60,000 men.

The plan of the Russian general was to move the bulk of his force, on the night of the 15th, by the roads leading from the Mackenzie Heights into lower ground, while two divisions marched from Korales down the Valley of Chouliou, and joined the left of the main body above Tchorgoun. The right column he entrusted to General Read. It consisted of the 7th and 12th divisions, and sixty-two guns. The left was under the orders of Liprandi, and was composed of the 5th, 17th, and 6th, and some ninety cannon. The 11th and 4th were in reserve, and remained so. General Liprandi led the way. On quitting the defile he was to move to his left, and before daylight drive the Sardinian outposts from the Mamelon, occupy that hill, and also the heights above Tchorgoun and Karlovka. The object of this was to give the Russians a good site, whence they might cannonade Mount Hasfort, and cover an infantry attack on that position. While Liprandi formed on the Sardinian Mamelon, Read was to bring his two divisions into line, but out of range; hold himself prepared to storm the Fedoukine heights, but not to make that attempt until he got orders to do so from Prince Gortschakoff.

All night on the 15th the Russian columns were moving silently down the steep road from Mackenzie, along the wooded valley of Chouliou, spreading out over the slopes, and pushing nearer and nearer to the outposts and patrols of the Allies. While this formidable host was approaching, the allied soldiers were asleep, and only the usual guards were under arms, and the usual patrols were moving across the front. Before daylight, however, the Sardinians got under arms; but the French do not appear to have turned out earlier than usual. Long security had bred confidence, and no doubt they relied upon their advanced posts, and not without reason. A thick fog hid everything in the valley, and hung heavily over the low meadows on both sides of the Tchernaya. Under cover of this, Prince Gortschakoff had got his troops into the positions he had designed them to occupy.

But the sentries were on the alert. There was a splutter of musketry in front of the bridge—a French patrol had stumbled in the fog upon the skirmishers of Read! Then followed a few reports near the Sardinian outpost, and a quick fire of musketry. General La Marmora, with great promptitude, sent a support across the Tchernaya to aid the riflemen on the Mamelon in delaying the advance of the enemy, while he made his final preparations. Liprandi had, while it was still dark, brought up such a heavy force, that although the Sardinians stood their ground with great gallantry, they were so pressed on all sides as to be forced out of their entrenchments, and were retiring down the hill as the support came up. The whole then gave ground before the enemy, and fell back upon the rocky elevation in front of the left of the Sardinian line, whence they were not expelled.

In the meantime the guns of Liprandi and Read were both in action; and the whole line of the Allies began to seize their arms and form. Morris's Chasseurs d'Afrique, 2,400 strong, formed between the left of the Sardinians and the right of the French, one regiment being at the head of the defile leading to the bridge. Saviroux's Sardinian cavalry, 300 men, came up on their right; and General Scarlett, turning out the British cavalry, a splendid force, 3,000 strong, moved them across the plain, and drew up in rear of the French and Italian squadrons. The Turkish and Sardinian guns were answering the fire of Liprandi's artillery; and two French batteries were ready to engage Read. So thick was the fog that the enemy's troops were still invisible, and pending the development of their attack, Generals La Marmora and Herbillon simply reinforced their outposts. Prince Gortschakoff has stated that about this time he had ridden on to the Sardinian Mamelon to survey the ground, and proceed with the execution of his original plan. While he was meditating and trying to pierce through the fog, he heard a violent fire of musketry on his right. General Read, without orders, as his superior officer avers, had begun the attack, and frustrated the whole scheme. From this moment the battle of the Tchernaya was a battle mainly between the French and Russians; the former, however, being assisted by the deadly fire of the British and Sardinian guns.