Aziraphale blinks, not expecting anyone to come across him so late. He looks, well, only slightly guilty and coughs, shuffling slightly from foot to foot -- having gotten to his feet at the first word. An awkward encounter, but one he can surely recover from while keeping how he knows what he's doing a secret.

"I'm not quite sure it has a name," he muses. Well, it does, but it was one of those sort of 'heavenly' names that aren't very kind to mortals. "It's used to communicated with the Beyond, and travel through to it -- I thought it might be useful for that gentleman." He gestures off to the side, at the spirit who's been lingering on the edges of all this.