On Saturday, July 21st, an uneasiness among the trainmen at Harrisburg and Scranton was observed, which, within the following two or three days, ripened into a strike. The first crowd which gathered in Harrisburg was on Saturday evening, the 21st of July, at the Pennsylvania railroad depot, to prevent the shipping of ammunition to Pittsburgh. The mayor was notified about ten o'clock, P.M., of what was going on, and he immediately sent for the chief of police, to make arrangements to meet the threatened danger. A lieutenant of police and another policeman being the only members of the force then available for prompt service, were sent to the scene of the trouble, and, by arrangement, arrested a man and started for the mayor's office with him, to draw the crowd from the depot. This ruse proved successful, and the ammunition was shipped before the crowd returned. Some three hundred or four hundred persons followed the policemen with their prisoner to the mayor's office, and, on their arrival there, the mayor went out and asked them to disperse, when about one half of the crowd left. The person arrested then appeared at the door, and informed the crowd that he had been arrested for drunkenness and disorderly conduct, and the balance of them dispersed. On Sunday, the 22d, the trainmen, whose head-quarters were at Harrisburg, struck, and in consequence thereof a large crowd gathered on the common, and listened to harangues from some of their number, among whom was an insane man from the lunatic asylum. From the common, the mob went to the Pennsylvania railroad depot, and prevented a train from going out, and the mayor, having notice of their movements, appeared upon the scene and found some boys uncoupling an engine from the train, which the mayor put a stop to, and requested the engineer to move on, which he refused to do, giving as an excuse that he was told there were obstructions on the track a short distance out of town. The crowd at this time was composed of all kinds of citizens, good, bad, and indifferent, and they soon dispersed, and no violence took place. On Monday, the 23d, the mob gathered in large force about the railroad premises, and there being a larger number of roughs and tramps, became more turbulent and interfered with the running of the trains. The mayor consulted the leading men about raising a posse to assist the police, there being only seventeen in the service of the city, and it was determined to raise a force of citizens, to be called the "law and order posse," who were to assemble at the mayor's office, on a given signal from the court-house bell.