In walking through the woods one day in early winter, we read upon the newly fallen snow the record of a mink's fright the night before. The mink had been traveling through the woods post-haste, not along the watercourses where one sees them by day, but over ridges and across valleys. We followed his track some distance to see what adventures he had met with. We tracked him through a bushy swamp, saw where he had left it to explore a pile of rocks, then where he had taken to the swamp again, then to the more open woods. Presently the track turned sharply about, and doubled upon itself in long hurried strides. What had caused the mink to change its mind so suddenly? We explored a few paces ahead, and came upon a fox track. The mink had seen the fox stalking stealthily through the woods, and the sight had probably brought his heart into his mouth. I think he climbed a tree, and waited till the fox passed. His track disappeared amid a clump of hemlocks, and then reappeared again a little beyond them. It described a big loop around, and then crossed the fox track only a few yards from the point where its course was interrupted. Then it followed a little watercourse, went under a rude bridge in a wood-road, then mingled with squirrel tracks in a denser part of the thicket. If the mink met a muskrat or a rabbit in his travels, or came upon a grouse, or quail, or a farmer's hen-roost, he had the supper he was in quest of. VI A LEGLESS CLIMBER The eye always sees what it wants to see, and the ear hears what it wants to hear. If I am intent upon birds'-nests in my walk, I find birds'-nests everywhere. Some people see four-leaved clovers wherever they look in the grass. A friend of mine picks up Indian relics all about the fields; he has Indian relics in his eye. I have seen him turn out of the path at right angles, as a dog will when he scents something, and walk straight away several rods, and pick up an Indian pounding-stone. He saw it out of the corner of his eye. I find that without conscious effort I see and hear birds with like ease. Eye and ear are always on the alert. One day in early June I was walking with some friends along a secluded wood-road. Above the hum of the conversation I caught the distressed cry of a pair of blue jays. My companions heard it also, but did not heed it.