About 10h. on the last day of the descent, the effect of Mars' attraction, which had for some time so disturbed the position of the Astronaut as to take his disc completely out of the field of the meta-compass, became decidedly predominant over that of the Sun. I had to change the direction of the apergic current first to the left-hand conductor, and afterwards, as the greater weight of the floor turned the Astronaut completely over, bringing the planet immediately below it, to the downward one. I was, of course, approaching Mars on the daylight side, and nearly in the centre. This, however, did not exactly suit me. During the whole of this day it was impossible that I should sleep for a minute; since if at any point I should find that I had miscalculated my rate of descent, or if any other unforeseen accident should occur, immediate action would be necessary to prevent a shipwreck, which must without doubt be fatal. It was very likely that I should be equally unable to sleep during the first twenty-four hours of my sojourn upon Mars, more especially should he be inhabited, and should my descent be observed. It was, therefore, my policy to land at some point where the Sun was setting, and to enjoy rest during such part of the twelve hours of the Martial night as should not be employed in setting my vessel in order and preparing to evacuate it. I should have to ascertain exactly the pressure of the Martial atmosphere, so as not to step too suddenly from a dense into what was probably a very light one. If possible, I intended to land upon the summit of a mountain, so high as to be untenanted and of difficult access. At the same time it would not do to choose the highest point of a very lofty range, since both the cold and the thinness of the air might in such a place be fatal. I wished, of course, to leave the Astronaut secure, and, if not out of reach, yet not within easy reach; otherwise it would have been a simple matter to watch my opportunity and descend in the dark from my first landing-place by the same means by which I had made the rest of my voyage.