Colonel Raaff, with a portion of Buller's horse, was halted near the kraal of Unodwingo to act as a reserve, and Buller, with 100 of his best mounted men, pushed on with the intention of exploring the ground as far as possible towards Ulundi. He knew that the bulk of the king's army was away upon Lord Chelmsford's right flank, and thought therefore that he might push on to Ulundi without opposition. The country consisted of a plain, across which ran some stony undulations, and at one point were two hollows, united at a right angle. The Zulu general disposed his men in shelter, and as Buller with his little band of horsemen rode up they rose and poured a very heavy fire into the ranks of the horsemen. Sudden and unexpected as was this attack, Buller's men were too well used to native fighting to evince the slightest confusion. In the most perfect order they began to fall back in alternate ranks, keeping up a steady fire upon the enemy, who were eagerly advancing. Raaff and his men rode up to the assistance of the hotly-pressed party, and Baker's horse, upon their hillock, opened a steady fire upon the Zulus. Gradually and steadily the cavalry fell back towards the river, the two guns on the opposite bank aiding them by their fire of grape and shrapnel upon the Zulus, who pressed forward with extreme bravery. Many gallant deeds were done. Lord William Beresford, who had accompanied the party as a volunteer, distinguished himself by his bravery and coolness. Seeing upon the ground a dismounted and wounded trooper, surrounded by a dozen Zulus, he wheeled his horse and dashed down among them, knocking over three with the rush of his horse, and cutting down two with right and left strokes of his sabre; in another moment he had the wounded man on his horse behind him, and carried him off in safety. Commander D'Arcy, also seeing a wounded man on the ground, tried to carry him off, but his horse, being restive, reared and fell back upon him, so that the unfortunate trooper was overtaken and assegaied; while D'Arcy, who was severely bruised by falling on his revolver, was able to get back safely, but was unable to take part in the next day's fight. A little before daybreak Wood with his flying column crossed the river, followed by the main army. The whole of the baggage was left in charge of the 24th, and nothing was taken, save the ammunition and water-carts, each man carrying four days' supply of biscuits and preserved meat in his haversack. The crossing of the river was made without any opposition, but the movements of the troops were watched by a party of Zulus from a hillock on the left.