midnight
One officer will proceed along the roof and station himself on the Zane trap , closing that outlet . At the same time the Zane house will be entered front and rear and searched . The time is due . It is midnight . Come ! '' Calvin pointed to a ladder that led from the corner of his study to the roof , and Duff Salter nodded his head acquiescently . They went up the ladder and thrust their heads into the soft night of early summer .