The man carried a lantern.

The candle with which the boys had been furnished by the doctor's arrangement had burned out.

Jack aroused his comrade, and the two followed the warder, who led the way along the corridor and down the stairs into the courtyard of the prison.
The man did not walk with any particular caution, and the lads judged from his movements that he had no fear whatever of interruption.

The door of the guard-room stood open, and by the light of the fire which blazed within, they could see the soldiers lying about in a drunken sleep.

At the gate itself the sentry on duty was sitting on the ground with his back against a wall, and his musket beside him, in a heavy drunken sleep.
The warder unlocked the door, the key being already in the lock; the three issued out; the gate was closed and locked on the outside, and the key thrust under the gate.