Because he was the sort of person who did what he was told, Aziraphale reported to the Library immediately after examining his flat and taking a look at his proof. Having said a perfunctory hello to his temporary coworkers, he was now digitally organizing e-books with all the skill of one who had only briefly touched a computer previously and had mostly used it for googling, and the enthusiasm of a society lady handling carrion.

"This is ridiculous," he muttered, oblivious to the world around him. Banging the side of the terminal he was working on, he stood up angrily with the intent to storm off and turned around, only to find a trembling man wandering off into the stacks and out of his line of sight.

What on Earth? Peering around the edge of the nearest shelf, he mumbled ancient obscenities as the man disappeared again. Those two glimpses, though, had convinced him that the gentleman was not all there.

"Are you all right?" he called after him, beginning to walk quickly down the stacks.