As for the less experienced operators along the line, they were--to use the expressive phrase usually applied to them--"up in the air." They knew that a single mistake might cost the lives of a score of people, and yet how were mistakes to be avoided when the instruments, instead of their usual clear-cut enunciation, stuttered and stammered and chattered meaninglessly. It was one of those crises which grow worse with each passing moment; when nerves, strained to snapping, finally give way; when brains, aching with anxiety, suddenly refuse to work; when, in a word, there is a break in the system to which even the smallest cog is necessary. So it was that the trainmaster, having swallowed his supper hastily, had hurried back to the office, and stood now peering out into the night, chewing nervously the end of a cigar which he had forgotten to light, and listening to the instruments clattering wildly on the tables behind him. Although there were two of them, and their clatter never ceased, he followed without difficulty the story which each was telling, for he had risen to his present position after long years at the key. Allan West had also hurried back to the office as soon as he had eaten his supper. It seemed to him that disaster was in the air; besides, he might be needed to carry a message, or for some other service, and he wanted to be on hand. It had been a hard day, for he had toiled back and forth across the slippery yards a score of times, but he forgot his fatigue as he sat there and listened to the crazy instruments and realized the tremendous odds against which the dispatchers were fighting. For the trains must be moved, and as nearly on time as human effort could do it. There is no stopping a railroad because of unfavourable weather. The movement of trains ceases only when an accident breaks the road in two or wreckage blocks the track, and then only until arrangements can be made to détour them past the place where the accident has occurred. When this cannot be done, a train is run to the spot from either side, and passengers, mail, and baggage transferred.