The performance began with the opening of the sentry-box on the right-hand side of the platform, as punctually as could be desired; the door on the other side, however, was less tractable--it remained obstinately closed. Unaware of this hitch in the proceedings, the corporal and his two privates appeared in their places in a state of perfect discipline, tottered out across the platform, all three trembling in every limb, dashed themselves headlong against the closed door on the other side, and failed in producing the smallest impression on the immovable sentry presumed to be within. An intermittent clicking, as of the major's keys and tools at work, was heard in the machinery. The corporal and his two privates suddenly returned, backward, across the platform, and shut themselves up with a bang inside their own door. Exactly at the same moment, the other door opened for the first time, and the provoking sentry appeared with the utmost deliberation at his post, waiting to be relieved. He was allowed to wait. Nothing happened in the other box but an occasional knocking inside the door, as if the corporal and his privates were impatient to be let out. The clicking of the major's tools was heard again among the machinery; the corporal and his party, suddenly restored to liberty, appeared in a violent hurry, and spun furiously across the platform. Quick as they were, however, the hitherto deliberate sentry on the other side now perversely showed himself to be quicker still. He disappeared like lightning into his own premises, the door closed smartly after him, the corporal and his privates dashed themselves headlong against it for the second time, and the major, appearing again round the corner of the clock, asked his audience innocently "if they would be good enough to tell him whether anything had gone wrong?"
The fantastic absurdity of the exhibition, heightened by Major Milroy's grave inquiry at the end of it, was so irresistibly ludicrous that the visitors shouted with laughter; and even Miss Milroy, with all her consideration for her father's sensitive pride in his clock, could not restrain herself from joining in the merriment which the catastrophe of the puppets had provoked. But there are limits even to the license of laughter; and these limits were ere long so outrageously overstepped by one of the little party as to have the effect of almost instantly silencing the other two. The fever of Midwinter's false spirits flamed out into sheer delirium as the performance of the puppets came to an end. His paroxysms of laughter followed each other with such convulsive violence that Miss Milroy started back from him in alarm, and even the patient major turned on him with a look which said plainly, Leave the room! Allan, wisely impulsive for once in his life, seized Midwinter by the arm, and dragged him out by main force into the garden, and thence into the park beyond.