Page:Cape Cod (1865) Thoreau.djvu/117

Rh quarter of a mile parallel with a fish about six feet in length, possibly a shark, which was prowling slowly along within two rods of the shore. It was of a pale brown color, singularly film-like and indistinct in the water, as if all nature abetted this child of ocean, and showed many darker transverse bars or rings whenever it came to the surface. It is well known that different fishes even of the same species are colored by the water they inhabit. We saw it go into a little cove or bathing-tub, where we had just been bathing, where the water was only four or five feet deep at that time, and after exploring it go slowly out again; but we continued to bathe there, only observing first from the bank if the cove was preoccupied. We thought that the water was fuller of life, more aërated perhaps than that of the Bay, like soda-water, for we were as particular as young salmon, and the expectation of encountering a shark did not subtract anything from its life-giving qualities.

Sometimes we sat on the wet beach and watched the beach birds, sand-pipers, and others, trotting along close to each wave, and waiting for the sea to cast up their breakfast. The former (Charadrius melodus) ran with great rapidity and then stood stock still remarkably erect and hardly to be distinguished from the beach. The wet sand was covered with small skipping Sea Fleas, which apparently make a part of their food. These last are the little scavengers of the beach, and are so numerous that they will devour large fishes, which have been cast up, in a very short time. One little bird not larger than a sparrow,—it may have been a Phalarope,—would alight on the turbulent surface where the breakers were five or six feet high, and float buoyantly