These tents are comfortably capacious for a dozen men. In cold or rainy weather, when every opening is closed, they are most unwholesome tenements, and to enter one of them of a rainy morning from the outer air, and encounter the night’s accumulation of nauseating exhalations from the bodies of twelve men (differing widely in their habits of personal cleanliness) was an experience which no old soldier has ever been known to recall with any great enthusiasm. Of course the air was of the vilest sort, and it is surprising to see how men endured it as they did. In the daytime these tents were ventilated by lifting them up at the bottom. Sibley tents went out of field service in 1862, partly because they were too expensive, but principally on account of being so cumbrous. They increased the amount of impedimenta too largely, for they required many wagons for their transportation, and so were afterwards used only in camps of instruction. I believe they are still used to some extent by the militia of the various States. I remember having seen these tents raised on a stockade four feet high by some regiments during the war, and thus arranged they made very spacious and comfortable winter quarters. When thus raised they accommodated twenty men. The camp for convalescents near Alexandria, Va., comprised this variety of tent stockaded. [Illustration: A, OR WEDGE TENTS.] The A or Wedge tents are yet quite common. The origin of this tent is not known, so far as I can learn. It seems to be about as old as history itself. A German historian, who wrote in 1751, represents the Amalekites as using them. Nothing simpler for a shelter could suggest itself to campers than some sort of awning stretched over a horizontal pole or bar. The setting-up of branches on an incline against a low horizontal branch of a tree to form a rude shelter may have been its earliest suggestion. But, whatever its origin, it is _now_ a canvas tent stretched over a horizontal bar, perhaps six feet long, which is supported on two upright posts of about the same length. It covers, when pitched, an area nearly seven feet square. The name of these tents is undoubtedly derived from the fact of the ends having the proportions of the Roman letter A, and because of their resemblance to a wedge. [Illustration: SPOONING TOGETHER.]