A thin, wettish giggle erupted. It grew until it filled the entire parlor. Asa backed across the room until he could go no further. The pitiless laughter moved so clearly and concretely that Matteo was able to follow it with his eyes, as if it were a solid entity. It moved quite rapidly across the floor and began to deliberately ascend the stairs. Ellie and her children pressed back against the wall, as if to let it pass without making physical contact. Alva watched it so precisely that Matteo believed she surely must be seeing it.