I have loitered so long on the meadow that before I get to Ball’s Hill those patches of bare ice (where water has oozed out and frozen) already reflect a green light which advertises me of the lateness of the hour. You may walk eastward in the winter afternoon till the ice begins to look green, half to three quarters of an hour before sunset, the sun having sunk behind you to the proper angle. Then it is time to turn your steps homeward. Soon after, too, the ice began to boom, or fire its evening gun, another warning that the end of the day was at hand, and a little after the snow reflected a distinct rosy light, the sun having reached the grosser atmosphere of the earth. These signs successively prompt us once more to retrace our steps. Even the fisherman, who perhaps has not observed any sign but that the sun is ready to sink beneath the horizon, is winding up his lines and starting for home; or perhaps he leaves them to freeze in.