indulgence was so to inflame the mucous membrane as, in the end, to render the thirst greater and greater the more the desire was indulged. Finally respiration became difficult and painful, and he arrived on board much exhausted. It is a good lesson for the ship's company,—a fact doubtless more consoling to me than to the sufferer.
October 29th.
CASTOR AND POLLUX. I went out to-day with Mr. Sonntag to his base line, and made some further measurements. In that direction there are a couple of mammoth icebergs, which I have named "The Twins." They loom up grandly against the dark western sky. Castor carries his head 230 feet above the sea, and Pollux, though of smaller dimensions, is seventeen feet higher.
After our usual evening game of chess, we have talked over some further projects for the field. I propose a drive into the region of Humboldt Glacier, Sonntag one to Van Rensselaer Harbor. It is important that the meridian of this latter place should be connected with that of Port Foulke. I yield to Sonntag for the present, and he starts the day after to-*morrow, weather permitting,—a proviso peculiarly necessary in this blustering place. There is very little light left to us, but the moon is full, and will probably serve to guide the party. There was not even the faintest streak of light to-day at three o'clock.
October 30th.
Sonntag is all ready to start. He will take two sledges, with Jensen and Hans for drivers. They are prepared for seven days' absence. I have allowed Sonntag to provide his own equipment, without interference. He has, I think, made it a little more cum-
