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The surrounding hills rise abruptly from the water to the
height of forty to eighty feet, though on the southeast and east they
attain to about one hundred and one hundred and fifty feet respectively,
within a quarter and a third of a mile. They are exclusively woodland.
All our Concord waters have two colors at least, one when viewed at a
distance, and another, more proper, close at hand. The first depends
more on the light, and follows the sky. In clear weather, in summer,
they appear blue at a little distance, especially if agitated, and at a
great distance all appear alike. In stormy weather they are sometimes of
a dark slate color. The sea, however, is said to be blue one day and
green another without any perceptible change in the atmosphere. I have
seen our river, when, the landscape being covered with snow, both water
and ice were almost as green as grass. Some consider blue "to be the
color of pure water, whether liquid or solid." But looking directly down
into our waters from a boat, they are seen to be of very different
colors.


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