Lucius opens the door. "Hello, Severus...I trust, then, that Horatio found..." he freezes, eyes widening slightly, as he sees who is with him. It takes a moment, but when he speaks again, his tone is still light and calm. "Well, now. This is, indeed, an unexpected surprise, Rodolphus." There is something slightly off about the way the name is said. "Come in, both of you." He steps back to let them pass.