Rayne walked down the stairs first and led the way towards the rear of the building across an open stretch of ground.

The moon had not yet risen, and it was pitch dark so that Hillyard had not an idea whither he was being led.

Colin Rayne stopped at a small, low door in a high big wall and knocked.

A heavy key grated in a lock and the door was opened by a soldier.
Hillyard found himself standing inside a big compound, in the midst of which stood some bulky, whitish erection, from which a light gleamed.
Colin Rayne led the way towards the light.

It was shining through the doorway of a chamber of new wood planks with a flat roof and some strange, dimly-seen superstructure.