We kept ourselves perfectly still. The dragoons evidently did not like the aspect of matters. Our remaining concealed, and not replying to their fire, seemed to bother them. We saw the officers taking a deal of pains to encourage their men, and at last two squadrons advanced, the others following more slowly, a short distance in rear. This was the moment we had waited for. No sooner had the dragoons got into a canter, than six of our men who had received orders to that effect, sprang up the bank, took steady aim at the officers, fired, and then jumped down again. As we had expected, the small numbers that had shown themselves, encouraged the Mexicans to advance. They seemed at first taken rather aback by the fall of four of their officers; but nevertheless, after a moment's hesitation, they came thundering along full speed. They were within sixty or seventy yards of us, when Fanning and thirty of our riflemen ascended the bank, and with a coolness and precision that would have done credit to the most veteran troops, poured a steady fire into the ranks of the dragoons. It requires some nerve and courage for men who have never gone through any regular military training, to stand their ground singly and unprotected, within fifty yards of an advancing line of cavalry. Our fellows did it, however, and fired, not all at once, or in a hurry, but slowly and deliberately; a running fire, every shot of which told. Saddle after saddle was emptied; the men, as they had been ordered, always picking out the foremost horsemen, and as soon as they had fired, jumping down the bank to reload. When the whole of the thirty men had discharged their rifles, Wharton and myself, with the reserve of six and thirty more, took their places; but the dragoons had almost had enough already, and we had scarcely fired ten shots when they executed a right-about turn, with an uniformity and rapidity which did infinite credit to their drill, and went off at a pace that soon carried them out of reach of our bullets. They had probably not expected so warm a reception. We saw their officers doing every thing they could to check their flight, imploring, threatening, even cutting at them with their sabres, but it was no use; if they were to be killed, it must be in their own way, and they preferred being cut down by their officers to encountering the deadly precision of rifles, in the hands of men who, being sure of hitting a squirrel at a hundred yards, were not likely to miss a Durango dragoon at any point within range.