About this time an undesirable lot of immigrants began to arrive, especially from the penal colonies of New South Wales. The criminals of the latter class soon became known to the populace as "Sydney Ducks." They formed a nucleus for an adventurous, idle, pleasure-loving, dissipated set of young sports, who organized themselves into a loose band very much on the order of the East Side gangs in New York or the "hoodlums" in later San Francisco, with the exception, however, that these young men affected the most meticulous nicety in dress. They perfected in the spring of 1849 an organization called the Regulators, announcing that, as there was no regular police force, they would take it upon themselves to protect the weak against the strong and the newcomer against the bunco man. Every Sunday they paraded the streets with bands and banners. Having no business in the world to occupy them, and holding a position unique in the community, the Regulators soon developed into practically a band of cut-throats and robbers, with the object of relieving those too weak to bear alone the weight of wealth. The Regulators, or Hounds, as they soon came to be called, had the great wisdom to avoid the belligerent and resourceful pioneer. They issued from their headquarters, a large tent near the Plaza, every night. Armed with clubs and pistols, they descended upon the settlements of harmless foreigners living near the outskirts, relieved them of what gold dust they possessed, beat them up by way of warning, and returned to headquarters with the consciousness of a duty well done. The victims found it of little use to appeal to the _alcalde_, for with the best disposition in the world the latter could do nothing without an adequate police force. The ordinary citizen, much too interested in his own affairs, merely took precautions to preserve his own skin, avoided dark and unfrequented alleyways, barricaded his doors and windows, and took the rest out in contemptuous cursing. Encouraged by this indifference, the Hounds naturally grew bolder and bolder. They considered they had terrorized the rest of the community, and they began to put on airs and swagger in the usual manner of bullies everywhere. On Sunday afternoon of July 15, they made a raid on some California ranchos across the bay, ostensibly as a picnic expedition, returning triumphant and very drunk. For the rest of the afternoon with streaming banners they paraded the streets, discharging firearms and generally shooting up the town. At dark they descended upon the Chilean quarters, tore down the tents, robbed the Chileans, beat many of the men to insensibility, ousted the women, killed a number who had not already fled, and returned to town only the following morning.