We soon got through our eating, and once more were _en route_ for the summit. We got there before sunset all right, and were received in most hospitable fashion by Professor Schaeberle, who showed us through the long halls and into the library, where transparencies and photographs of eclipses and double stars, and various other celestial phenomena charmed us, until at last it was announced that the royal presence of the sun was about to sink to its rest, in the distant west. Then all were soon out on the grand terrace, and as we watched the great, round orb vanish from our sight, a silence fell upon us all, the cause of which it would be hard to put into words. We had seen the great mystery of life move on a point. We thought, perhaps, of the angel trumpeter, who some day will say so that all will hear, "Time shall be no more!" We thought, perhaps, of that day when we should close our eyes upon the earthly sun forever, and days for us should be at an end. As the darkness settled down, so solemnly and grandly on the mountains, we retraced our steps to the Observatory, and followed our kind guide through its many mysteries. We first looked through some of the smaller telescopes. In one of these, while the glow was still in the heavens, we saw Venus, the evening star, in all its beauty. The earth currents, through which we had to look, gave the glowing planet a purplish tinge and a sort of vibratory motion, which quite suggested the floating movements of the goddess, as she figures in Virgil's verse. We saw all sorts of instruments, of the most delicate and yet simple character, for recording seismic disturbances of any kind, or, as we might call them in plainer speech, earthquakes. It is most interesting to note how a glass disk, a little lamp-black, a spring or two, a bit of clockwork, and a tracing-pen, will do the work automatically, and record the direction, the duration, and the time of any seismic disturbance at any hour of day or night. The brain which contrived all this cunning machinery, can go to rest and take its needed sleep, but the wires and traps set to catch the shakes of the old globe, are always wide awake, animated ever by the intelligence of the brain which sleeps, and can sleep in peace; for, when the brain wakes, it will find that the machine has faithfully recorded every quiver of this old, trembling world. Professor Schaeberle told me, with quiet humor, that earthquakes of some kind were always going on, but so slight that machinery alone could detect them.