Read it through once

They could then see the faint summer fogs in layers, woolly, level, and apparently no thicker than counterpanes, spread about the meadows in detached remnants of small extent. On the gray moisture of the grass were marks where the cows had lain through the night—dark-green islands of dry herbage the size of their carcasses, in the general sea of dew. From each island proceeded a serpentine trail, by which the cow had rambled away to feed after getting up, at the end of which trail they found her; the snoring puff from her nostrils, when she recognized them, making an intenser little fog of her own amid the prevailing one. Then they drove the animals back to the barton, or sat down to milk them on the spot, as the case might require.