Which sentence uses humor in this excerpt from Charles Farrar Browne's "Interview with President Lincoln"?
"Mr. Linkin, who do you spect I air?" sed I.
"A orfice-seeker, to be sure," sed he.
"Wall, sir," sed I, "you's never more mistaken in your life
You hain't gut a orfiss I'd take under no circumstances
Repose in Abraham's Buzzum!" sed one of the orfice seekers