Leadville is a "long gulch [...] littered with wreckage, shacks, and mine tailings" (4.3.1). Sounds lovely, doesn't it?
There's a big commotion up ahead. Oliver avoids Susan's curious questions and steers them away to a secluded path.
Finally, Oliver and Susan see the house: it's a tiny log cabin. There's smoke already coming out of the chimney, which Oliver credits to Frank Sargent, a son of a general, who is Oliver's assistant.
Oliver and Susan enter the house. It's a little disappointing to Susan, as it's just one room. Not exactly a penthouse suite.
Just then, Frank arrives. He was apparently off hunting flowers for Susan's arrival (what a smooth customer), but he couldn't find any.
Frank mentions the commotion in town. Oliver tries to kill the conversation, but Susan forces Frank to give her the 411.
Turns out, two men were just "hanged [...] out in front of the jail" (4.3.49). One of them was Jeff Oates, the dude who had stolen Oliver's land. The other guy had apparently shot up a stagecoach—presumably the one Oliver and Susan had seen hightailing it out of town.