At 1 p.m. the cavalry on the right gave up the crests which they had maintained so long, covered up to the last by the 21st battery on the left, and on the right by the 69th battery, whose escort had been strengthened by "C" squadron 5th Dragoon Guards taken from Limit Hill. At 2.30 p.m. French's command was in Ladysmith, following the 1st Manchester regiment, which had retired on the right of the cavalry. With the exception of four companies of the 1st Devonshire regiment, left upon Limit Hill, the rest of the troops engaged had reached their camps a short time previously. Only the tents of Carleton's two battalions were seen to be empty when evening fell. [Sidenote: Carleton's night march begins 11.15 p.m. 29th Oct./99.] [Sidenote: The disaster.] Carleton's detachment had moved from the rendezvous at 11.15 p.m. in the following order: first, under Major C. S. Kincaid, a small party of 1st Royal Irish Fusiliers, who marched with fixed bayonets; then Colonel Carleton himself, with Major W. Adye, D.A.A.G. for Intelligence, and the guides; behind them the 1st Royal Irish Fusiliers, followed by their 46 mules; then the 10th Mountain battery, with 133 mules; then the 57 mules of the 1st Gloucester regiment; next five and a half companies of that battalion, and finally a small rearguard, under Captain B. O. Fyffe, of the Gloucester. The valley of the Bell Spruit was wrapped in profound darkness, yet the force pushed on at a rapid pace, and, in spite of the noise of its progress, was undetected by the Boer piquets on the hills on either side. Shortly after 1 a.m. the van was opposite the southern spur of the height called Kainguba, at the other extremity of which, some two miles due north, lay the object of the expedition, Nicholson's Nek. The column was here in perfect order, the road to the Nek was good, and there was promise of about two hours of darkness to conceal the remainder of the march. But Colonel Carleton, thinking more of the lateness of his start than of the excellence of his progress, and remembering that his orders had not bound him absolutely to Nicholson's Nek, came to the conclusion at this point that, if, as seemed possible, he could not reach the Nek before dawn, it would be extremely rash to be surprised by daylight in a narrow defile. He decided, therefore, at least to make good the dangerous high ground on his left by occupying the nearest crest of Kainguba above him, intending, if time allowed, to continue his march to the Nek from this vantage ground. He therefore wheeled the leading files to the left, and at their head began the boulder-obstructed and finally almost precipitous ascent of the mountain, ordering guides to be left to indicate the point of the change of direction to the units following the Royal Irish Fusiliers. When the head of that battalion had climbed two-thirds of the steep a mysterious and fatal incident occurred. Suddenly from the darkness