The Concord River at Lowell

September 9.

In Lowell.-- My host says that the thermometer was at 80° yesterday morning, and this morning is at 52º. 

Sudden coolness.

Clears up in afternoon, and I walk down the Merrimack on the north bank.

I see very large plants of the lanceolate thistle, four feet high and very branching.

Also Aster cordata with the corymbosus.

Concord River has a high and hard bank at its mouth, maybe thirty feet high on the east side; and my host thinks it was originally about as high on the west side, where now it is much lower and flat, having been dug down.

There is a small isle in the middle of the mouth.

There are rips in the Merrimack just below the mouth of the Concord.

There is a fall and dam in the Concord at what was Hurd's factory, — the principal fall on the Concord, in Lowell, — one at a bleachery above, and at Whipple's, — three in all below Billerica dam.

  

H.D. Thoreau, Journal, September 9, 1860