They have tried the bolts, and find they can move them;" and with these words, he at once stepped noiselessly out.
Oswald stood listening.

Presently he heard the returning steps of the sentry.

They came close up to the turret, and then suddenly ceased.
He at once hurried round.

The sentry hung limp in Roger's grasp.

Oswald bound his hands tightly, and twisted the rope three or four times round his body, and securely knotted it.