The eddy and wearing away of the bank at the stone bridge.

July 20. 

The little Holbrook boy showed me an egg which I unhesitatingly pronounced a peetweet's, given him by Joe Smith. The latter, to my surprise, declares it a meadow-hen's; saw the bird and young, and says the latter were quite black and had hen bills. Can it be so? 

Humphrey Buttrick says he finds snipes' nests in our meadows oftener than woodcocks'. 

P. M. — To Eddy Bridge. 

Abel Hosmer says that the Turnpike Company did not fulfill their engagement to build a new bridge over the Assabet in 1807; that the present stone bridge was not built till about the time the Orthodox meeting-house was built. (That was in 1826.) Benjamin says it was built soon after the meeting-house, or perhaps 1827, and was placed some fifty feet higher up-stream than the old wooden one. 

Hosmer says that the eddy and wearing away of the bank has been occasioned wholly by the bridge; that there was only the regular bend there before. He had thought that it was in consequence of the bridge being set askew or diagonally with the stream, so that the abutments turned the water and gave it a slant into the banks. I think that this did not create, only increased, the evil. 

The bank which it has worn away rises some sixteen feet above low water, and, considering the depth of the water, you may say that it has removed the sand to a depth of twenty-five feet over an area of a quarter of an acre, or say to the depth of three feet or a yard over two acres, or 9680 cubic yards or cartloads, which, at twenty-five cents per load, it would have cost $2420 to move in the ordinary manner, or enough to fill the present river for a quarter of a mile, calling it six rods wide and twelve feet deep. 

Beside creating some small islands and bars close by, this sand and gravel has, of course, been distributed along in the river and on the adjacent meadows below. 

Hosmer complains that his interval has accordingly been very much injured by the sand washed on to it below, — "hundreds of dollars" damage done to him. All this within some thirty-five years. 

It may well be asked what has become of all this sand? Of course it has contributed to form sand-bars below, possibly a great way below. 

Jacob Farmer tells me that he remembers that when about twenty-one years old he and Hildreth were bathing in the Assabet at the mouth of the brook above Winn's, and Hildreth swam or waded across to a sand bar (now the island there), but the water was so deep on that bar that he became frightened, and would have been drowned if he had not been dragged out and resuscitated by others. This was directly over where that island is now, and was then only a bar beginning under water. That island, as he said, had been formed within thirty-five years, or since the Eddy Bridge was built; and I suggest that it may have been built mainly of the ruins of that bank. 

It is the only island in the Assabet for two and a half miles. 

There is a perfect standstill in the eddy at Eddy Bridge now, and there is a large raft of grass, weeds, and lumber perfectly at rest there, against Hosmer's bank. The coarser materials — stones as big as a hen's egg — are dropped close by, but the sand must have been carried far down-stream. 

Hosmer says that when he digs down in his millet- field, twenty rods or more from the river, in his interval, at three or four feet depth he comes to coarse stones which look like an old bed of the river. I see them at each of the small wooden bridges, and very likely they underlie the whole of that interval, covered with sand. 

Such is the character of a river-bottom, — the stones from a hen's egg to the size of your head dropped down to one level, the sand being washed away, and now found in one stratum. 

So completely emasculated and demoralized is our river that it is even made to observe the Christian Sabbath, and Hosmer tells me that at this season on a Sunday morning (for then the river runs lowest, owing to the factory and mill gates being shut above) little gravelly islands begin to peep out in the channel below. Not only the operatives make the Sunday a day of rest, but the river too, to some extent, so that the very fishes feel the influence (or want of influence) of man's religion. 

The very rivers run with fuller streams on Monday morning. All nature begins to work with new impetuosity on Monday. 

I see where turtles' eggs are still being dug up!

H. D. Thoreau, Journal, July 20, 1859

The coarser materials — stones as big as a hen's egg — are dropped close by, but the sand must have been carried far down-stream. See July 16, 1859 ("It is remarkable how the stones are separated from the sand at the Eddy Bridge and deposited in a bar or islands by themselves a few rods lower down.")