one o'clock
Meanwhile , as the night wore on , the minds of all those present became impatient . Prepared for the angry struggle as they were , they longed for the opportunity to show their strength . They made desperate use of their ears and eyes . At one o'clock there was an alarm that showed the pitch which the nervous tension had reached . A shot was fired on the first floor , followed by shouts . On inquiry , it was found that two detectives , meeting in the course of a round , had not recognized each other , and one of them had discharged his revolver in the air to inform his comrades . In the meantime the crowd outside had diminished , as M. Desmalions perceived on opening the garden gate .