Martel is one of the few individuals who is always welcome about the Snape residence - by himself, anyway, let's not push our luck. Severus is in the dungeon (we could call it a basement laboratory, but why?) when he gets the notification, and not up to anything pressing, cleans up his work and drifts topside, arriving at the heavy doors just in time to let him in. There are no servants here, which is undoubtedly not surprising - just him, the occasional bird, and, well. Gillian. Though he's not about, presently.

"Martel."