He has been there before many times.

Connelly knows him well." All this was so circumstantial that Fairfax Lee was alarmed and moved.
He knew that Connelly's was one of the worst dens of the city, and he felt sure that unless there was something in the story Pike would not give names in this way.

He resolved to learn the whole truth about the matter.
"If what you say is true, Buck Badger is not fit to associate with any girl," he asserted.
"Especially not with a girl as innocent and unsuspecting as your daughter, Mr.Lee.I have seen that for a good while, and it has been a fight with my conscience to keep from coming here with this story.

I couldn't delay it longer.

I trust you see that I can have no hope of gain, and nothing but right motives in bringing you this story--which you will find fully substantiated by a course of inquiry." Fairfax Lee was flushed and silent.
"All of Badger's friends, or most of them, I am sure, know that he was drunk, and not drugged, when he went aboard the _Crested Foam_.