Mike Carey wrote:
"Oh, and the ashtray says
SED REVOCARE GRADUS, SUPERASQUE EVADERE AD AURAS, HOC OPUS, HIC LABOR EST.
It's from Vergil, and it means ""but to retrace your steps and find your way again into the upper air, that's the hard part.""
It comes after the words FACILIS DESCENSUS AVERNI, ""easy is the descent to Hell.""
"
