"At any rate, " said the bachelor, collecting his belongings preparatory to leaving the carriage, "I kept them quiet for ten minutes, which was more than you were able to do."
The author's use of the first person to convey the story allows readers to go along for the ride into madness and cultivates a certain amount of sympathy for the narrator and her plight. The constant use of "I" puts us right in the narrator's head and allows us to empathize with her