Thoreau writes in his journal:
I first heard that tchuck soundas of fish striking a padon the 2d of June, when there were very few weeds in the river, and have since heard it repeatedly . . .
I noticed as I sat in my boat by the riverside last evening [12 June.], half an hour after sunset, a very low and local, yet dense, fog close to the shore . . . a foot high by three or four wide for several rods.