The first and most important consideration is transport. Nobody who has not seen for himself can realise what a great matter this is. I well recall my amazement, when watching a camel convoy more than a mile and a half long, escorted by half a battalion of infantry. I was informed that it contained only two days' supplies for one brigade. People talk lightly of moving columns hither and thither, as if they were mobile groups of men, who had only to march about the country and fight the enemy wherever found, and very few understand that an army is a ponderous mass which drags painfully after it a long chain of advanced depots, stages, rest camps, and communications, by which it is securely fastened to a stationary base. In these valleys, where wheeled traffic is impossible, the difficulties and cost of moving supplies are enormous; and as none, or very few, are to be obtained within the country, the consideration is paramount. Mule transport is for many reasons superior to camel transport. The mule moves faster and can traverse more difficult ground. He is also more hardy and keeps in better condition. When Sir Bindon Blood began his advance against the Mohmands he equipped his 2nd Brigade entirely with mules. It was thus far more mobile, and was available for any rapid movement that might become necessary. To mix the two--camels and mules--appears to combine the disadvantages of both, and destroy the superiority of either. I have already described the Indian service camp and the "sniping" without which no night across the frontier could be complete. I shall therefore only notice two points, which were previously omitted, as they looked suspiciously technical. As the night firing is sometimes varied by more serious attacks, and even actual assaults and sword rushes, it is thought advisable to have the ditch of the entrenchment towards the enemy. Modern weapons notwithstanding, the ultimate appeal is to the bayonet, and the advantage of being on the higher ground is then considerable. When a battery forms part of the line round a camp, infantry soldiers should be placed between the guns. Artillery officers do not like this; but, though they are very good fellows, there are some things in which it is not well to give way to them. Every one is prone to over-estimate the power of his arm.