While strolling around, we kept the run of the moon all the time, and we still kept an eye on her after we got back to the hotel portico. I had a theory that the gravitation of refraction, being subsidiary to atmospheric compensation, the refrangibility of the earth's surface would emphasize this effect in regions where great mountain ranges occur, and possibly so even-handed impact the odic and idyllic forces together, the one upon the other, as to prevent the moon from rising higher than 12,200 feet above sea-level. This daring theory had been received with frantic scorn by some of my fellow-scientists, and with an eager silence by others. Among the former I may mention Prof. H----y; and among the latter Prof. T----l. Such is professional jealousy; a scientist will never show any kindness for a theory which he did not start himself. There is no feeling of brotherhood among these people. Indeed, they always resent it when I call them brother. To show how far their ungenerosity can carry them, I will state that I offered to let Prof. H----y publish my great theory as his own discovery; I even begged him to do it; I even proposed to print it myself as his theory. Instead of thanking me, he said that if I tried to fasten that theory on him he would sue me for slander. I was going to offer it to Mr. Darwin, whom I understood to be a man without prejudices, but it occurred to me that perhaps he would not be interested in it since it did not concern heraldry. But I am glad now, that I was forced to father my intrepid theory myself, for, on the night of which I am writing, it was triumphantly justified and established. Mont Blanc is nearly sixteen thousand feet high; he hid the moon utterly; near him is a peak which is 12,216 feet high; the moon slid along behind the pinnacles, and when she approached that one I watched her with intense interest, for my reputation as a scientist must stand or fall by its decision. I cannot describe the emotions which surged like tidal waves through my breast when I saw the moon glide behind that lofty needle and pass it by without exposing more than two feet four inches of her upper rim above it; I was secure, then. I knew she could rise no higher, and I was right. She sailed behind all the peaks and never succeeded in hoisting her disk above a single one of them. While the moon was behind one of those sharp fingers, its shadow was flung athwart the vacant heavens--a long, slanting, clean-cut, dark ray--with a streaming and energetic suggestion of FORCE about it, such as the ascending jet of water from a powerful fire-engine affords. It was curious to see a good strong shadow of an earthly object cast upon so intangible a field as the atmosphere.