What happened with the first visitor ?

The first visitor is Black Dog.

In January, a few months after the first chapter concludes, a strange man, wearing a cutlass and missing two fingers, appears at the inn inquiring about a man with a cut on his check, someone he refers to as Bill. The narrator explains that Bill is on the bluffs and will likely return that evening. Making sure the boy cannot warn Bill of his presence, the stranger makes the boy hide until Bill appears. When Bill finally appears, he looks like he has seen a ghost when he sees the stranger, whom he identifies as Black Dog, one of his shipmates. After telling the boy to leave, the two talk together in low voices. The only thing that the boy overhears is the captain speaking about all "swinging," (meaning hanging), before there is a loud commotion. After the outcry, Black Dog, with a cut on his shoulder flees, the captain pursues him, both with drawn cutlasses. The captain aims at Black Dog but misses and hits the inn's signboard instead, leaving Black Dog to escape.

WHy did the captain decide to stay at the admiral benbow ?

WHo did the captain tell Jim to watch for ?

Who were the two visitors who came to see the captain ?

Please ask each of your questions separately in separate posts.