Which sentence from “The Treasure of Lemon Brown” contains indirect characterization?

He was an old man.
Greg felt himself near panic.
The old man looked out, then beckoned frantically for Greg to follow him.
One of the clippings said he had been the hit of the show, although not the headliner.

the old man looked out, then beckoned frantically for greg to follow him

Explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".