It was fastened. The green holland blind was drawn, but as far as he could ascertain the shutters were not closed.
From his pocket he drew a glazier’s putty-knife, and, inserting it between the sashes, worked quietly until his heart gave a bound of satisfaction at feeling the latch slowly give.
A second later it went back with a sharp snap, and the window was free!
He lifted the sash, pushed the blind aside, and crept within.
Then leaning forth he whispered to Charlie to follow. Up the latter came by means of the rope as quickly as he was able, and a few moments later both men stood within the room.
By its sound, and by the fact that it was carpetless, they knew it was devoid of furniture. Max flashed on the light, and the truth was at once made plain. The apartment was square and of fair size, but within was not a single thing; was perfectly empty.
In a second a thought occurred to Charlie.
“If the door’s locked on the outside we’re done!” he gasped.
They both crossed to the door in an instant, and Max placed his hand upon it. The handle turned slowly, and the door yielded. By great good fortune it was not locked.
Creeping noiselessly outside, they found themselves upon a big square landing above half a dozen broad stairs. Below them was the white-enamelled iron door, which opened only to its owner and which no person had been known to pass.