 No, Miss Addison, Dr. Jekyll isn't home. He left here soon after half past nine, and he hasn't come in yet. But where did he go? I've no idea. He left by way of the laboratory. The laboratory? Yes. You see, there's a door that lets him out onto the street by a back way. He often goes out that way, Miss. But look, I can see a light there now. He must have come back again.