in Thoreau’s Journal:

 P. M. —To Conantum.

A thick mist, spiriting away the snow. Very bad walking. This fog is one of the first decidedly spring signs also the withered grass bedewed by it and wetting my feet. A still, foggy, and rather warm day.

I heard this morning, also, quite a steady warbling from tree sparrows on the dripping bushes, and that peculiar drawling note of a hen, who has this peevish way of expressing her content at the sight of bare ground and mild weather. The crowing of cocks and the cawing of crows tell the same story. The ice is soggy and dangerous to be walked on.