From the vicinity of Alexandria the regiment afterwards traversed the country to Rosetta, and advanced from thence along the banks of the Nile, taking part in the operations by which the French were forced to quit their fortified post at _Rahmanie_, where the TWELFTH lost several men and horses. While possession was being taken of the fort of Rahmanie, Lieutenant Drake and thirty men of the regiment went out to water their horses, and hearing a firing at a distance, they proceeded to the spot, and found fifty men of the Twenty-second French Dragoons skirmishing with a party of Arabs. The TWELFTH advanced with the most determined gallantry, but at the moment when they were about to charge, the French captain held up a white handkerchief, and agreed to surrender. An aide-de-camp, with despatches, was also made prisoner on this occasion. From Rahmanie, the army advanced along the banks of the Nile towards Cairo, and arrived on the 16th of May at _Algam_ and Nadir. On the following morning some Bedouin Arabs arrived at Colonel Browne's tent with information that a body of French were in the Lybian Desert; the colonel sent them to head-quarters, and immediately despatched Lieutenant Francis Raynes with a small detachment into the desert; also ordered the light artillery and cavalry to feed and water their horses, and be ready to move at a moment's notice: Lieutenant Catson was afterwards sent out with another small detachment to keep up the communication with the first. Soon afterwards Brigadier-General Doyle was directed to enter the desert with his brigade of infantry,--the TWELFTH and Twenty-sixth Light Dragoons (two hundred and fifty men) and some artillery. At the same time Colonel Abercromby and Major Wilson galloped forward to find the enemy. After proceeding some distance at a brisk trot the Light Dragoons came in sight of the French column, which had been skirmishing with the Arabs. The enemy was very superior in numbers; the British artillery was some distance in the rear, and the infantry was not in sight; but Major Wilson advanced with a white handkerchief on the point of his sword, and proposed to the French commander, Colonel Cavalier, to surrender on condition of being sent to France, and the officers to retain their private property. This was at first refused, but Colonel Browne forming the TWELFTH and Twenty-sixth Light Dragoons rank-entire, with extended files, they presented a formidable appearance; and the French officers and soldiers, being weary of Egypt, and desirous of returning to France, surrendered. This proved to be a valuable French convoy of 28 officers. 570 rank and file, 1 stand of colours, 1 light four-pounder, 300 horses and dromedaries, and 500 camels. One hundred and twenty men of Bonaparte's famous dromedary corps were among the prisoners, and presented a grand and novel appearance; and the horses and camels formed a valuable acquisition to the British army.