In the July number of Packard's Monthly, an able and sprightly magazine, published in this city, there appeared an article by Mr. Oliver Dyer, entitled "The Wickedest Man in New York." It was a lengthy and interesting account of a dance-house, carried on at No. 304 Water street - one of the vilest sections of the city - by one John Allen, and of the proprietor himself. As many of our readers may not have seen this article, we give portions of it, referring them to the magazine for the rest.