“The lights flicker as if somebody is toying with a fundamental binary code housed somewhere in the electrical circuit. But that would be impossible, wouldn’t it? The most reasonable answer would be to suggest that there’s an errant wire somewhere, but all logic has been lost a long time ago. Down the corridor, vaguely illuminated for a split-second before it plunges into darkness once more, there’s a note. The inscription on it can be barely made out. ‘Coffee this way,’ it reads.