On the 10th of March the Sutlej was crossed by means of a bridge of boats (which had been constructed for the accommodation of the British troops by the Sikh government) by the force under the command of Lieut.-Colonel Bolton, of the THIRTY-FIRST regiment. The force, which consisted of the THIRTY-FIRST regiment, the sixth native infantry, some troops of Tait’s irregular horse, and Delafosse’s troop of horse artillery, arrived at Peshawur on the 21st of April, and was most hospitably entertained by General Avitabile,[26] by order of the Maharajah Shere Singh. Before the corps could join the army, Major-General Pollock forced the Khyber Pass, and marched on to Jellalabad, at which place he arrived on the 16th of April; the Affghans had, on the 7th of April, been attacked, and defeated, by Major-General Sir Robert Sale; Mahomed Akbar Khan was consequently obliged to abandon the siege of Jellalabad, which he had blockaded since February, 1842. The THIRTY-FIRST regiment, which had followed Major-General Pollock by forced marches, joined at Jellalabad on the 5th of May,--after making a halt for about five days at Peshawur,--having undergone much privation on the way by the desertion of the camel-drivers: several deaths occurred from famine and fatigue. The army was halted in wretched tents at Jellalabad, the climate of which is known to be so unhealthy during the summer as to cause it to be used by the natives as a winter residence only. Soon the effects of this displayed itself; the days became so oppressive that both officers and men were obliged to dig deep holes underground in which to shield themselves, in some slight measure, from the burning heat of the sun. The thermometer rose as high as 126° in the tents, and man and beast fell stricken by the extreme heat. Neither was it in men alone that the army was daily losing its efficiency. From the valley of Jellalabad having been so long the seat of war, the fertile land had become a desert,--the wretched half-starved camels could find no forage on the bare face of the sand, and they died by hundreds; their dead bodies lying about in all directions, swollen with the sun, and emitting the most horrid exhalations, together with the filth and dirt of a standing camp of 50,000 men, added to the disease which raged among the troops. The army suffered a loss which the most sanguinary encounter with the enemy could not have exceeded. At last, it was found necessary to divide the force, and the fourth brigade, in which was the THIRTY-FIRST regiment, was ordered to march under Brigadier Monteath to Peshbolak, in the Shinwaree country, to punish some refractory tribes, which had behaved with great treachery to a party of Jezailchees, who had been at the former place, and to bring to submission the unruly Shinwarees, who had attacked several convoys, and been guilty of many acts of murder and plunder.