We had several fine rides with brother-officers among the cañons and bluffs while stopping over to inspect our military posts _en route_, and a grand gallop one bright September morning over the Plains and far away after antelope. In the cañons and along the bluffs we started plenty of jack-rabbits; but the antelope were shy and apparently always on the run, so much so we could never get within shot of them. We formed a long line across the country, and as we swept forward started two or three small herds; but they were all too fleet for Uncle Sam's coursers. Subsequently we halted, and lying down tried the old hunter's trick of enticing them with a handkerchief on a ramrod, with our rifles ready to blaze away as they drew near; but they were too cunning to be caught by any such rascally flag-of-truce arrangement, and it seemed a shame to attempt it. The ride itself, however, was a great satisfaction, full of excitement, exhilaration, enjoyment. The sky was a perfect sapphire, without cloud or haze. The clear atmosphere braced one's nerves like wine, and revealed distant objects with a pre-Raphaelite distinctness. A pyramid-like "butte," off to the southwest, seemed near at hand, though more than twenty miles away. The ground was baked hard, with a thin covering of dry-grass, except in the occasional buffalo-wallows; and altogether our horses seemed to enjoy the gallop quite as much as we did ourselves. There was just a spice of danger in the ride, too, as Indians were reported prowling about, but none appeared. We left the Platte with its bluffs and cañons behind us, and out into the boundless Plains we rode, on and on, and only drew rein when we discovered that we had lost our reckoning, and were without a compass. The person charged with providing this had forgotten it, and suddenly we found ourselves at sea, without guide or headland. Fortunately we had the well-worn buffalo-trails, that there run almost due north and south--the old paths over which they formerly went to and from the Platte for water--and following up one of these, after an hour or two, we found ourselves in sight of the river again. These "trails" are no wider than ordinary cow-paths, but they are worn deep into the soil, and show by their great number and depth what countless herds of buffalo must have roamed here in other days. They are a sure guide up and down the bluffs, many of which are so precipitous that safe ascent or descent elsewhere seems impossible. But the buffalo, by a wise instinct, seems to have hit just the right point, and deserves credit for such skillful engineering.