Thoreau writes in his journal:
8.30 A.M.—Up Assabet in boat.
At last I push myself gently through the smooth and sunny water, sheltered by the Island woods and hill, where I listen for birds, etc. There I may expect to hear a woodpecker tapping the rotten aspen tree. There I pause to hear the faint voice of some early bird amid the twigs of the still wood-side. You are pretty sure to bear a woodpecker early in the morning over these still waters. But now chiefly there comes borne on the breeze the tinkle of the song sparrow along the riverside, and I push out into wind and current. Leave the boat and run down to the white maples by the bridge . . .