Birds'-nests, in the Huckleberry and other shrubs, and in trees, are already being filled with the withered leaves. So many have fallen in the woods, that a squirrel cannot run after a falling nut without being heard. Boys are raking them in the streets, if only for the pleasure of dealing with such clean crisp substances. Some sweep the paths scrupulously neat, and then stand to see the next breath strew them with new trophies. The swamp-floor is thickly covered, and the _Lycopodium lucidulum_ looks suddenly greener amid them. In dense woods they half-cover pools that are three or four rods long. The other day I could hardly find a well-known spring, and even suspected that it had dried up, for it was completely concealed by freshly fallen leaves; and when I swept them aside and revealed it, it was like striking the earth, with Aaron's rod, for a new spring. Wet grounds about the edges of swamps look dry with them. At one swamp, where I was surveying, thinking to step on a leafy shore from a rail, I got into the water more than a foot deep. When I go to the river the day after the principal fall of leaves, the sixteenth, I find my boat all covered, bottom and seats, with the leaves of the Golden Willow under which it is moored, and I set sail with a cargo of them rustling under my feet. If I empty it, it will be full again to-morrow. I do not regard them as litter, to be swept out, but accept them as suitable straw or matting for the bottom of my carriage. When I turn up into the mouth of the Assabet, which is wooded, large fleets of leaves are floating on its surface, as it were getting out to sea, with room to tack; but next the shore, a little farther up, they are thicker than foam, quite concealing the water for a rod in width, under and amid the Alders, Button-Bushes, and Maples, still perfectly light and dry, with fibre unrelaxed; and at a rocky bend where they are met and stopped by the morning wind, they sometimes form a broad and dense crescent quite across the river. When I turn my prow that way, and the wave which it makes strikes them, list what a pleasant rustling from these dry substances grating on one another! Often it is their undulation only which reveals the water beneath them. Also every motion of the wood-turtle on the shore is betrayed by their rustling there. Or even in mid-channel, when the wind rises, I hear them blown with a rustling sound. Higher up they are slowly moving round and round in some great eddy which the river makes, as that at the "Leaning Hemlocks," where the water is deep, and the current is wearing into the bank.