“Aconite. And what might that be, I wonder?” “Well, it’s poison, for one thing,” I said. Mr. Haugh’s mouth dropped open momentarily. “It’s a medicine, too,” I assured him. “But you have to be careful in the use of it. Externally, it’s good for rheumatism, but a very tiny amount taken by mouth will lower the rate of the pulse. Good for some kinds of heart trouble.”
