when they both simultaneously stopped to listen, looking into each other's eyes with a new apprehension across the flickering candle flame. From the room they had left hardly ten seconds before came the sound of doors quietly closing. It was beyond all question; they heard the booming noise that accompanies the shutting of heavy doors, followed by the sharp catching of the latch.
"We must go back and see," said Shorthouse briefly, in a low tone, and turning to go downstairs again.
Somehow she managed to drag after him, her feet catching in her dress, her face livid.
When they entered the front drawing-room it was plain that the folding doors had been closed—half a minute before. Without hesitation Shorthouse opened them. He almost expected to see someone facing him in the back room; but only darkness and cold air met him. They went through both rooms, finding nothing unusual. They tried in every way to make the doors close of themselves, but there was not wind enough even to set the candle flame flickering. The doors would not move without strong pressure. All was silent as the grave. Undeniably the rooms were utterly empty, and the house utterly still.
