sparks shooting out of it as from glowing iron which has just been taken from the forge. But as night declines and day approaches, the light begins to fade; and when daylight appears, it seems to vanish entirely. The men who have thought about and discussed these lights have guessed at three sources, one of which, it seems, ought to be the true one. Some hold that fire circles about the ocean and all the bodies of water that stream about on the outer sides of the globe; and since Greenland lies on the outermost edge of the earth to the north, they think it possible that these lights shine forth from the fires that encircle the outer ocean. Others have suggested that during the hours of night, when the sun’s course is beneath the earth, an occasional gleam of its light may shoot up into the sky; for they insist that Greenland lies so far out on the earth’s edge that the curved surface which shuts out the sunlight must be less prominent there. But there are still others who believe (and it seems to me not unlikely) that the frost and the glaciers have become so powerful there that they are able to radiate forth these flames. I know nothing further that has been conjectured on this subject, only these three theories that I have presented; as to their correctness I do not decide, though the last mentioned looks quite plausible to me. I know of no other facts about Greenland that seem worth discussing or mentioning, only those that we have talked about and what we have noted as the opinions of well-informed men. ------------------------------------------------------------------------ XX THE SUBJECT OF THE NORTHERN LIGHTS CONTINUED _Son._ Everything that you have told here seems wonderful to me, though also very instructive, and this fact most of all, that men, as you have pointed out, are able to leave the earth, as it were, and view for themselves the boundaries which God has drawn amid such great perils. Your last remark, however, suggests that there is yet a little matter to inquire about along this same line. In speaking of those three conjectures you said that you think it most likely that these lights have their origin in frost and ice; but just before in describing their appearance, you added that now and then fog and dark mist resembling smoke would mount up among these lights. But even if the cold should be so prevalent there as to give rise to these lights with their fire-like rays, I cannot help wondering whence that smoke can come which sometimes appears to shade and becloud the light till it seems almost quenched; for to me it seems more likely that the smoke is due to heat than to frost. There is one more thing that looks strange to me which you mentioned earlier in your speech, namely that you consider Greenland as having a good climate, even though it is full of ice and glaciers. It is hard for me to understand how such a land can have a good climate.