_First_.--At midnight on Saturday, the 29th day of August, 1868, JOHN ALLEN closed his dance-house, No. 304 Water Street, where he had for nearly seventeen years kept a rum shop and house of prostitution. As soon after such closing of the dance-house as the rooms could be arranged for the purpose, a prayer-meeting was held in the dancing saloon, with the concurrence of Mr. ALLEN and his wife. This meeting was begun at about half an hour after midnight, and continued until one o'clock in the morning. It was conducted and participated in by Messrs. ALBERT C. ARNOLD, Rev. H. C. BEACH and OLIVER DYER; and there were present Mr. and Mrs. ALLEN, the girls of the establishment, and a couple of ALLEN's neighbors, one of whom had been a liquor seller in the Fourth Ward for twenty years. _Second_.--On the next day, the Sabbath, Mr. ALLEN attended worship, in the afternoon, at the Howard Mission, and then and there publicly announced that he had closed his dance-house, never to open it again for any evil purpose. On the evening of the same day, a public prayer- meeting was for the first time held in ALLEN's house, hundreds of persons of all classes crowding the premises, among whom were some of the most abandoned characters of the neighborhood. _Third_.--Since these meetings were begun, they have been continued daily from noon till one o'clock, P. M., in Mr. ALLEN'S house; and on Sabbath, there have been large outdoor meetings in front of the premises. On the 11th of September, the house of THOMAS HADDEN, No. 374 Water street, kept as a low groggery and sailor's boarding-house, was also opened for religious services, at the hour of 12 o'clock; the rooms being filled to overflowing, multitudes being unable to enter. At the same hour a prayer-meeting was in progress at Allen's, and another upon the sidewalk opposite, to accommodate those who could not get within the doors at either Allen's or Hadden's. [Illustration: Noon-Day Prayer Meeting at "The Wickedest Man's" Dance- House.] _Fourth_.--These meetings have been attended and sustained by Christians of all denominations, and have uniformly been characterized by extraordinary fervency and power. The congregations have been, to a considerable extent, composed of sailors and residents of the Ward, (the Fourth,) which is known as the worst ward in the city. Some of the most wretched outcasts of this infamous locality have been present, and have, in several instances, requested prayer and private religious instruction; some cases resulting, as it is hoped, in their permanent reformation and conversion. THE OTHER SIDE.