"Is it properly closed?"
"You can see for yourself; it's locked and bolted with a safety bolt. Both keys are on my bunch; so is the key of the garden gate."
He placed the bunch of keys on the table with his pocket-book and, after first winding it, his watch.
Don Luis, without troubling to ask permission, took the keys and unfastened the lock and the bolt. A flight of three steps brought him to the garden. He followed the length of the narrow border. Through the ivy he saw and heard the two policemen pacing up and down the boulevard. He tried the lock of the gate. It was fastened.
"Everything's all right," he said when he returned, "and you can be easy. Good-night."
"Good-night," said the engineer, seeing Perenna and Mazeroux out.
Between his study and the passage were two doors, one of which was padded and covered with oilcloth. On the other side, the passage was separated from the hall by a heavy curtain.
"You can go to sleep," said Perenna to his companion. "I'll sit up."
"But surely, Chief, you don't think that anything's going to happen!"
"I don't think so, seeing the precautions which we've taken. But, knowing Inspector Vérot as you did, do you think he was the man to imagine things?"
"No, Chief."
"Well, you know what he prophesied. That means that he had his reasons for doing so. And therefore I shall keep my eyes open."
