Thoreau writes in his journal:
The sun down, and I am crossing Fair haven hill, sky overcast, landscape dark and still. I see the smooth river in the north reflecting two shades of light, one from the water, another from the surface of the pads which broadly border it on both sides, and the very irregular waving or winding edge of the pads, especially perceptible in this light, makes a, very agreeable border to distinguish,—the edge of the film which seeks to bridge over and inclose the river wholly. These pads are to the smooth water between like a calyx to its flower. The river at such an hour, seen half a mile away, perfectly smooth and lighter than the sky, reflecting the clouds, is a paradisaical scene. What are the rivers around Damascus to this river sleeping around Concord? Are not the Musketaquid and the Assabet, rivers of Concord, fairer than the rivers of the plain?