A bedroom without a single window is an unusual feature. Even what little Mayerling has seen of Trench shows that. The very language Luke uses suggests it's both unusual and possibly intentional. Vampires are few in Trench but not so few as to be unknown. It gives him pause—not that Luke may try to kill him—but questions that may yet be too personal.

"The moon is bright enough that I may check how effective light is blocked," Mayerling says. "If the bedroom door leaks light, it may well be that you cannot leave your residence until sundown without endangering me." It is something a person unused to the stringent needs of a vampire may overlook. It may not matter this time, when Luke expects to watch over him the entire time, but if the man entertains others, it is best to know in advance. The same information could be used to trap and to kill a vampire, but he trusts vampires to be as careful with their well being as he must.

"We choose to trust each other," Mayerling notes. "As you trust me, I will trust you." Indeed, he expects it is a larger matter of trust on Luke's side.