It is reported that nine regiments are marching down from Turkistan to Cabul, and are even now at Charikar in Kohistan. Two squadrons of the 12th Bengal Cavalry go out to-morrow to reconnoitre the road. Two fatal cases of cholera occurred to-day; generally, however, the force is in splendid health. Too liberal indulgence in fruit may possibly have been the cause of the cholera. Brigadier-General Gough will start in a few days, with a small force, for the Shutargardan, whence he will bring on supplies. The 14th Bengal Lancers have captured twelve guns (six 9-pounders and six mule guns) on the Bamian Road, which were abandoned by the Ghazni Regiments. The horses had been taken away. So far we have heard nothing of the Khyber Force, which is supposed to co-operate with this division, and our letters are still sent to the Shutargardan. CAMP SIAH SUNG, _16th October_. We had begun to settle down to a quiet life in camp here after our full-dress parade through the Bala Hissar and the city, and after all our late excitement a little rest was very welcome; but we have been suddenly shaken into action by such an untoward event as the explosion of the vast stores of gunpowder in the Cabul Arsenal, in the neighbourhood of the 67th Regiment and the 5th Ghoorkas, who were garrisoning the fortress. It was announced, while we were marching here from Kushi, that the rebels in Cabul had plundered the Arsenal and looted the magazine, but this was found afterwards to be only partially true. They had certainly carried off many rifles from the Arsenal and several thousand rounds of ammunition, but there was still left munitions of war sufficient to have supplied all Afghanistan. A systematic examination, under the direction of Captain Shafto, of the Ordnance Department, was set on foot immediately our troops went into garrison in the Bala Hissar, and the result was the discovery of some millions of cartridges, Enfield and Snider, of English and Afghan make, and some 150,000 lbs. of gunpowder, besides valuable stores, such as could he useful to an army engaged in active warfare. Daoud Shah, the late Commander-in-Chief of the Afghan army states, there is at least 1,000,000 lbs. of gunpowder hidden in the place. The Arsenal was little worthy of its name; there were no regular workshops, no foundry and but little machinery, the building being merely made up of a score or more of godowns (sheds) arranged under the strong walls of the upper part of the Bala Hissar, on the hill immediately overlooking the Residency and the Amir’s pleasure-garden, where the Durbar was held by Sir F. Roberts. In these godowns there was none of that care and precaution taken, such as is insisted upon in English arsenals and magazines. The gunpowder was chiefly stored in huge earthen gurrahs and dubbers (such as ghee is usually carried in), and in many instances these had been tilted over and loose powder scattered on the ground.