Chapter 51

There, in a locked, bolted, impregnable chamber, unmarked by the least sign of entry--a main door which did not have a key, responding only to a combination known only to himself--a secondary door most obviously locked, and from the inside; windows of thick glass, triple locked with the latest in patent catches--someone or something had entered, passing, as it seemed, through bolts and bars, through walls, through steel and stone and concrete, like a djinn, or a wraith--_through the keyhole_? Matter-of-fact as he w…