Holmes nods, meaning he understands this is all speculation, but he can't argue the facts. "Still," he writes, "coincidences do happen. And two incidents do not really make a pattern. That being said, I don't wish for something more dire to happen in order to prove you right." He takes a pull on his pipe, thinking. "There are fifty-six members of the council," he tells Severus. "You could work yourself to death and not be able to protect them all. Perhaps it would be best to focus on these people who have aroused your apprehensions. Perhaps they aren't done." Holmes writes that last rather heavily.