By stepping on to the window-sill and steadying himself against one of the pillars, he could reach an iron stanchion, which had evidently been placed to support the framework of the superstructure.

From here to the parapet of the conservatory itself was but a swing.

This glass-house had casement windows, one of which was open, and he leaned on his elbows and cautiously intruded his head.
The place was empty.

The light came from an inner room opening into the glass sheltered balcony.

Quickly he slipped through the windows and crouched under the shadow of a big oleander.