During the spring and summer of last year (1899) it was possible for me to have a police officer's experience. The chief of a large railroad police force gave me a position as a patrolman, and, in company of two other officers, I was put on a "beat" extending over two thousand miles of railroad property. The work we were given to do was somewhat of an innovation, but it afforded me an excellent opportunity to secure the information I desired. For two months and a half, which was the extent of my connection with the undertaking and with the force, we had to travel over the property, protecting picnic trains, big excursions, passengers travelling to and from towns where circuses were exhibiting, and the ordinary scheduled traffic, whenever there was reason to believe that pickpockets and other thieves were likely to put in an appearance. Early in the spring wandering bands of thieves start out on tours of the railroads. They follow up circuses and picnics, and make it a point to attend all big gatherings, such as county fairs, races, conclaves, and congresses. Their main "graft," or business, is pocket-picking, but in a well-equipped "mob" there are also burglars, sneak-thieves, and professional gamblers. The pickpockets and gamblers operate, when they can, on passenger trains, and they have become so numerous and troublesome in a number of States that railroad companies are compelled to furnish their own protection for their patrons. This protection, on the road for which I worked, has generally been provided for by the stationary members of the force, and more or less satisfactorily, but last year the chief wanted to experiment with "a flying squadron" of officers, so to speak, who were to go all over the property and assist the stationary men as emergency required, and we three were chosen for this work. In this way it was possible for me to come in contact with a large variety of offenders, to make comparisons, and to see how extensively criminals travel. It was also easy for me to get an insight into the workings of different police organisations along the line, and to inspect carefully lock-ups, jails, workhouses and penitentiaries.