'Warm in December, cold in June, you say?' I don't suppose the water's changed at all. You and I know enough to know it's warm Compared with cold, and cold compared with warm. But all the fun's in how you say a thing.
Before the Civil War, Canada was at the top of the underground railroad. If you made it into Canada, you were safe unless someone came and hauled you back. That was also true during the Vietnam War for draft resisters.