Allan handed them to him with a sigh of relief that all was well, and notified the dispatcher that first ninety-seven had reached Byers at 7.16.

It may be well to explain, at this point, that the regular freight-trains on every road are usually run in sections, the number of sections depending upon the amount of freight to be moved. For instance, if, toward the middle of the afternoon, there has accumulated in the yards at Wadsworth only enough west-bound freight for a single train, the cars are made up, and at seven o’clock, immediately following the accommodation, regular west-bound freight-train No. 97 is started toward Cincinnati, and runs as nearly as possible on the schedule given it in the time-table.

If, however, there are too many cars for one engine to handle, they are made up into two trains, and the first one that goes out is called the first section, and displays at the front of the engine two green lights to show that another section is following. Ten minutes later, the second section is sent out, displaying no signals. Theoretically, both sections constitute one train, and the track cannot be used by any other train until both get by; but this is a theory which is constantly broken in practice. Sometimes, when freight business is heavy—in the fall, for instance, when the grain crops are being moved and the merchants throughout the country are laying in their supplies for the holidays—there will be three or four sections of each of the regular freight-trains.

But while this system allows for a certain expansion of traffic to suit the road’s business, by far the greater part of the freight in the busy season is handled by “extras”—that is, by trains which have no place on the time-card and no regular schedules, but which must run from station to station, whenever the track happens to be clear. For instance, as soon as Number Two, the east-bound flyer, pulls into the yards at Wadsworth, an extra west-bound freight will be started out, with orders to run extra to the end of the division. The conductor is armed with the time-card, and must keep out of the way of all trains which appear on it. He is also provided with meeting orders for all the other extras which happen to be going over the road at the same time, and must take care to comply with them. As he goes from station to station, he is kept informed as to whether any of the regular trains are behind time, so that he need not wait on any of them unnecessarily, but may get over the road as rapidly as possible. The actual conduct of the train is left largely to him and to the engineer, so that their responsibility is no light one.

All of this sounds much easier than it really is. As a matter of fact, the task of carrying on the business of a single-track road, where it is practically impossible for all trains to run on time, where meeting-points must be provided for all freight-trains, without delaying them unduly, and where the passenger-trains must have always a clear track and opportunity to make up as much time as possible, if they happen to be late, is one of the most delicate and nerve-racking that could be imagined, though under the new double-order system it is not so bad as it was under the old single-order one.

The burden of keeping things moving and of getting the trains over the road in the shortest possible time, falls principally upon the dispatcher at headquarters, but every operator along the road bears his part, and an important part. He must keep awake and alert for any orders the dispatcher may wish to send him; he must note the passage of every train and report to the dispatcher the exact moment at which it passed; and he must be sure that the station signals are properly displayed, and that all orders are properly delivered. Upon the faithful fulfilment of these duties does the safety of trains depend; but especially upon the second, for unless the dispatcher knows accurately the exact position of every train, disaster is sure to follow.

Only once that night did Allan have any trouble. That was about three o’clock in the morning. There had not been many orders for Byers, for traffic was light, and he had passed the time listening to the orders sent the other operators and studying the time-card and book of rules with which all operators are provided. But at last his sounder began to clatter out the already familiar "-..., -..., B, B," which was the call for Byers. He answered it and took down the following message on his manifold sheet:

“Hold extra east, eng. 632, at B.”

Allan repeated it at once from his copy, and a moment later, “Com 3.10 C R H” was flashed back to him.

The “com” meant “complete,” showing that the order had been accurately repeated; the “3.10” was the time the order was sent, and the “C R H” were the initials of the superintendent, which are signed to all train-orders. Three copies must be made of every such order, one for the conductor, one for the engineer, and the other for preservation by the operator. This is done by using tissue-paper for the orders—which are usually called “flimsies” for that reason—between the sheets of which carbon-paper has been placed. A steel-pointed instrument called a stylus is used to write with, instead of pen or pencil, in order that the impression through the three sheets may be clear and distinct.