He began to nail on his card, and I rushed out to
the express car, in a good
deal of a state of mind, to ask
for an explanation. But no--
there was my box, all right, in
the express car; it hadn't
been disturbed.
A. Situational Irony - without realizing it,
the narrator almost prevented the mix-up
of the boxes.
B. Humor - nailing a card on a box is
humorous.
C. Verbal Irony - the narrator says one
thing -- "Is that my box?" -- but means
another.