The cavalry lines were nearer to him below, and were some way in advance of the Highlanders, but nearer to the town than the Turkish redoubts. The valley was crossed here and there by small waves of land. On the left the hills and rocky mountain ranges gradually closed in towards the course of the Tchernaya, till, at three or four miles' distance from Balaklava, the valley was swallowed up in a mountain gorge and deep ravines, above which rose tier after tier of desolate whitish rock, garnished now and then by bits of scanty herbage, and spreading away towards the east and south, where they attained the Alpine dimensions of the Tschatir Dagh. It was very easy for an enemy at the Belbek, or in command of the road of Mackenzie's farm, Inkerman, Simpheropol, or Bakschiserai, to debouch through these gorges at any time upon this plain from the neck of the valley, or to march from Sebastopol by the Tchernaya, and to advance along it towards Balaklava, till checked by the Turkish redoubts on the southern side, or by the fire from the French works on the northern--_i.e._, the side which, in relation to the valley at Balaklava, formed the rear of our position. It was evident enough that Menschikoff and Gortschakoff had been feeling their way along this route for several days past, and very probably at night the Cossacks had crept up close to our pickets, which were not always as watchful as might be desired, and had observed the weakness of a position far too extended for our army to defend, and occupied by their despised enemy, the Turks. At half-past seven o'clock on the eventful morning of the 25th, an orderly came galloping in to the head-quarters camp from Sir Colin Campbell with the news, that at dawn a strong corps of Russian horse, supported by guns and battalions of infantry, had marched into the valley, had nearly dispossessed the Turks of the redoubt No. 1 (that on Canrobert's Hill, which was farthest from our lines), and they had opened fire on the redoubts Nos. 2, 3, and 4. Lord Lucan, who was in one of the redoubts when they were discovered, brought up his guns and some of his heavy cavalry, but they were obliged to retire owing to the superior weight of the enemy's metal.