Several key human errors contributed to the spread of the Chicago fire of 1871. When the blaze first began, Bruno Goll refused to sound the first alarm, which was housed in his drugstore. Later, at the courthouse, Mathias Schaffer instructed his assistant, William J. Brown, to sound Box 342 instead of Box 319, sending firefighters toward the wrong location. When Schaffer realized his mistake, Brown flat-out refused to strike the correct box. Even after the fire, Brown was confident in his decision not to correct the mistake. Finally, as the blaze raged on, fireman John Dorsey attempted to sound a special alarm, but accidentally sounded a general alarm. This meant that additional trucks and equipment were not immediately sent out to help. Which is one essential detail to this paragraph?

Excerpt from an enemy of the people henrik ibsen mrs. stockmann. (turns to the hall door, listening.) i expect that is mr. hovstad coming. billing. very likely. (peter stockmann comes in. he wears an overcoat and his official hat, and carries a stick.) peter stockmann. good evening, katherine. mrs. stockmann (coming forward into the sitting-room). ah, good evening--is it you? how good of you to come up and see us! peter stockmann. i happened to be passing, and into the dining-room). but you have company with you, i see. mrs. stockmann (a little embarrassed). oh, no--it was quite by chance he came in. (hurriedly.) won't you come in and have something, too? peter stockmann. i! no, you. good gracious--hot meat at night! not with my digestion, when peter stockmann enters, what does his physical appearance to reveal about his character?