A, 11, O, 12, B, 1221, P, 2121, C, 212, Q, 2122, D, 111, R, 122, E, 21, S, 121, F, 1112, T, 1, G, 1122, U, 221, H, 211, V, 2111, I, 2, W, 2212, J, 2211, X, 1211, K, 1212, Y, 222, L, 112, Z, 1111, M, 2112, &, 2222, N, 22, ing, 1121, tion, 2221. When the flag stops at an upright position, it means the end of a letter--as, twice to the right and stop (11) means A; one dip forward (3) indicates the end of a word; 33, the end of a sentence; 333, the end of a message. Thus 11-11-11-3 means "All right; we understand over here; go ahead"; and 11-11-11-333 means "Stop signaling." Then 212-212-212-3 means "Repeat; we don't understand what you are signaling"; while 12-12-12-3 means "We have made an error, and if you will watch we will give the message to you correctly." Now, if Lieutenant Coleman wanted to say to another signal-officer "Send one man," the sentence would read in figures, "121, 21, 22, 111, 3, 12, 22, 21, 3, 2112, 11, 22, 33." But in time of war the signalmen of the enemy could read such messages, and so each party makes a cipher code of its own, more or less difficult; and the code is often changed. So if Lieutenant Coleman's cipher code was simply to use for each letter sent the fourth letter later in the alphabet, his figures would have been quite different, and the letters they stood for would have read: W-i-r-h s-r-i q-e-r. S-e-n-d o-n-e m-a-n. So, after fifteen minutes of waiting, during which time the flag in Corporal Bromley's hand made a great rustling and flapping in the wind, moving from side to side, Lieutenant Coleman got his glass on the other flag, ten miles away, and found it was waving 11-11-11-3--"All right." Corporal Bromley then sent back the same signal, and sat down on the bank to rest. What Lieutenant Coleman saw at that distance was a little patch of red dancing about on the object-glass of his telescope; he could not see even the man who waved it, or the trees behind him. Promptly at Bromley's signal "All right," the little object came to a rest; and when it presently began again, Lieutenant Coleman called off the letters, which Philip repeated as he entered them in the book. For an hour and a half the messages continued repeating all the mass of figures which had come over the line during the last three days.