noon
The guards went into the sentry boxes and set down the heavy rifles . Wagg made a general survey of the scene . No person was moving in the open area of the yard . The veteran of the guard was well acquainted with the customary habits and movements of the noon hour . He knew that the men in the main guardroom were reduced to a shift of two while the others went to their dinners ; the two men were in the habit of giving the deserted yard only indifferent attention . But Mr. Wagg had provided against even casual glances . For purposes of his own , which a boss did not need to explain , he had nailed boards together to form something like a door , six feet square .