July 14, 2014
P. M. — Sounded river from Ball's Hill (i. e. off Squaw [?] Harbor) to Atkins's boat-house corner.
The river, in all the above distance, nowhere washes the base of an isolated (i. e. to except long, lowish hill- banks like Clamshell, etc.) steep hill, without a greater depth off it. The average depth between Sudbury Causeway and Atkins's boat-house bend at wall, or for fifteen miles two hundred and eighty-two rods, is eight and one eighth feet.
There extends from Tarbell Hill to Skelton Bend what I will call the Straight Reach, a mile and a third long and quite straight. This is the finest water view, making the greatest impression of size, of any that I know on the river. It is very broad, deep, and clear of weeds. Average depth 11+ feet (and at highest water some 19 feet). The bottom is almost everywhere muddy. No weeds in the middle.
Measuring on the plan by Baldwin, it is three to four hundred feet wide. The depth is also very uniform, varying but little (in the thread) from the average 11 + (except a deep hole and channel at the commencement off Tarbell Hill).
H. D. Thoreau, Journal, July 14, 1859
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