All the riders were young men selected for their nerve, light weight, and general fitness. No effort was made to uniform them, and they dressed as their individual fancy dictated, the usual costume being a buckskin hunting-shirt, cloth trousers tucked into a pair of high boots, and a jockey-cap or slouch-hat. All rode armed. At first a Spencer rifle was carried strapped across the back, in addition to a pair of army (Colt's) revolvers in their holsters. The rifle, however, was found useless, and was abandoned. The equipment of the horses was a light riding-saddle and bridle, with the saddle-bags, or mochila, of heavy leather. These had holes cut in them so that they would fit over the horn and tree of the saddle. The mochilas had four pockets, called cantinas, one in each corner, so as to have one in front and one behind each leg of the rider; in these the mail was placed. Three of these pockets were locked and opened en route at military posts and at Salt Lake City, and under no circumstances at any other place. The fourth was for way-stations, for which each station-keeper had a key, and also contained a way-bill, or time-card, on which a record of arrival and departure was kept. The same mochila was transferred from pony to pony and from rider to rider until it was carried from one terminus to the other. The letters, before being placed in the pockets, were wrapped in oiled silk to preserve them from moisture. The maximum weight of any one mail was twenty pounds; but this was rarely reached. The charges were originally $5 for each letter of one half-ounce or less; but afterward this was reduced to $2.50 for each letter not exceeding one half-ounce, this being in addition to the regular United States postage. Specially made light-weight paper was generally used to reduce the expense. Special editions of the Eastern newspapers were printed on tissue-paper to enable them to reach subscribers on the Pacific coast. This, however, was more as an advertisement, there being little demand for them at their necessarily large price.

Wiping out a station.

At first, stations averaged 25 miles apart, and each rider covered three stations, or 75 miles, daily. Later, stations were established at intermediate points, reducing the distance between them, in some cases, to 10 miles, the distance between stations being regulated by the character of the country. This change was made in the interest of quicker time, it having been demonstrated that horses could not be kept at the top of their speed for so great a distance as 25 miles. At the stations, relays of horses were kept, and the station-keeper's duties included having a pony ready bridled and saddled half an hour before the express was due. Upon approaching a station, the rider would loosen the mochila from his saddle, so that he could leap from his pony as soon as he reached the station, throw the mochila over the saddle of the fresh horse, jump on, and ride off. Two minutes was the maximum time allowed at stations, whether it was to change riders or horses. At relay-stations where riders were changed the incoming man would unbuckle his mochila before arriving, and hand it to his successor, who would start off on a lope as soon as his hand grasped it. Time was seldom lost at stations. Station-keepers and relay-riders were always on the lookout. In the daytime the pony could be seen for a considerable distance, and at night a few well-known yells would bring everything into readiness in a very short time. As a rule, the riders would do 75 miles over their route west-bound one day, returning over the same distance with the first east-bound express.

Frequently, through the exigencies of the service, they would have to double their route the same day, or ride the one next to them, and even farther. For instance, "Buffalo Bill" (W. F. Cody) for a while had the route from Red Buttes, Wyoming, to Three Crossings, Nebraska, a distance of 116 miles. On one occasion, on reaching Three Crossings, he found that the rider for the next division had been killed the night before, and he was called upon to cover his route, 76 miles, until another rider could be employed. This involved a continuous ride of 384 miles without break, except for meals and to change horses. Again, "Pony Bob," another noted rider, covered the distance from Friday's Station to Smith's Creek, 185 miles, and back, including the trip over the Sierra Nevada, twice, at a time when the country was infested by hostile Indians. It eventually required, when the service got into perfect working order, 190 stations, 200 station-keepers and the same number of assistant station-keepers, 80 riders, and from 400 to 500 horses to cover the 1950 miles from St. Joseph to Sacramento. The riders were paid from $100 to $125 per month for their services. Located about every 200 miles were division agents to provide for emergencies, such as Indian raids, the stampeding of stock, etc., as well as to exercise general supervision over the service. One, and probably the most notorious, of these was Jack Slade, of unenviable reputation. For a long time he was located as division agent at the crossing of the Platte near Fort Kearney.

The riders were looked up to, and regarded as being "at the top of the heap." No matter what time of the day or of the night they were called upon, whether winter or summer, over mountains or across plains, raining or snowing, with rivers to swim or pleasant prairies to cross, through forests or over the burning desert, they must be ready to respond, and, though in the face of hostiles, ride their beat and make their time. To be late was their only fear, and to get in ahead of schedule their pride. There was no killing time for them, under any circumstances. The schedule was keyed up to what was considered the very best time that could be done, and a few minutes gained on it might be required to make up for a fall somewhere else. First-class horses were furnished, and there were no orders against bringing them in in a sweat. "Make your schedule," was the standing rule. While armed with the most effective weapon then known, the Colt revolver, they were not expected to fight, but to run away. Their weapons were to be used only in emergencies.

An incident between stations.