"Top gun's office, probably," Blaise said, still frowning at the blueprint. "I suppose not every member lives on premises. Hermione didn't." The reminder caused Draco to frown, but he let it pass. "But even so, there's only ten rooms on the second floor. Maybe seven or eight more on the fourth. Based on the sizes I can't imagine they're shared... surely they've got more than seventeen or eighteen assassins on site?" Blaise looked up, towards Weasley, who was still focusing on the strings of numbers and didn't respond.