The last two or three days have been among the coldest in the winter, though not so cold as a few weeks ago. I notice, in the low ground covered with bushes near Flint’s Pond, many little rabbit-paths in the snow, where they have travelled in each other’s tracks, or many times back and forth, six inches wide. This, too, is probably their summer habit. The rock by the pond is remarkable for its umbilicaria (?).