Naturalists tells us that the ermine is an animal with pure white fur, and when hunters want to trap it, they use this trick: knowing the places where it customarily travels and can be found, they obstruct those places with mud, and then they beat the bushes and drive it toward that spot, and when the ermine reaches the mud it stops and lets itself be captured and caught rather than pass through the mire and risk soiling and losing the whiteness that it values more than liberty and life.
