But the best joke of all is in their manner of calling off the half-hours at night, and of challenging. Sometimes we hear No. 2 call off, "No. 2, ten o'clock, and all is well," in a most natural and unconcerned tone of voice, while No. 3 may sing out, "No. 3, ten o'clock and all is well-l-l," changing his tone only on the last word. Then No. 4, with another variation, may call off, "No. 4, ten o'clock, and all-l-l-l's well," changing his tone on "all-l-l-l's," and speaking the rest, especially the last word, in a low and natural manner of voice, and sometimes abruptly. And so on along the entire chain of sentinels, each one calls off in a manner different from that of the rest. Sometimes the calling off is scarcely to be heard, sometimes it is loud and full, and again it is distinct but squeakish. It is indeed most delightful to be in one's tent and here the plebes call off in the still quiet hours of the night. One can't well help laughing, and yet all plebes, more or less, call off in the same manner. Plebe sentinels are very troublesome sometimes to the non-commissioned officers of the guard. They receive their orders time after time, and when inspected for them most frequently spit them out with ease and readiness; but just as soon as night comes, and there is a chance to apply them, they "fess utterly cold," and in the simplest things at that. Nine plebes out of ten almost invariably challenge thus, "Who comes here?" "Who stands here?" "Who goes here?" as the case may be, notwithstanding they have been repeatedly instructed orally, and have seen the words, as they should be, in the regulations. If a person is going, and is a hundred yards or so off, it is still, "Who goes here?" Everything is "here." One night the officer of the day concealed himself near a sentinel's post, and suddenly appeared on it. The plebe threw his gun down to the proper position and yelled out, "Who comes here?" The officer of the day stopped short, whereupon the plebe jumped at him and shouted, "Who stands here?" Immediately the officer started off, saying as he did so, "I'm not standing; I'm going." Then of course the challenge was again changed to, "Who goes here? "I'm not going; I'm coming," said the officer, facing about and approaching the sentinel. This was kept up for a considerable time, till the officer of the day got near a sentry-box and suddenly disappeared. The plebe knew he was there, and yelled in a louder tone than before, "Who stands here? "Sentry-box," was the solemn and ghostly response. It is hardly reasonable, I think, to say the plebe was frightened; but he actually stood there motionless, repeating his challenge over and over again, "Who stands here?"