He thought he heard a step.

In another moment or two the step was unmistakable.

Some one was approaching his window from the end of the building.

He leaned over the sill and found himself staring into O'Connor's face.
"These confounded feet of mine!" grunted the staff-sergeant.

"Were you asleep, Kent ?" "Wide-awake as those owls," assured Kent.
O'Connor drew up to the window.