This part of Japan, and, in fact, the whole of Japan, has a good deal of volcanic fire pent up beneath it. Earthquakes are of frequent occurrence, and sometimes they are very destructive; whole towns have been destroyed by them, and as for the little ones that do no material damage, but simply give things a general shaking-up, they are so frequent as to be hardly noticeable. That there is an underground relation between the disturbances in different parts of the country is evident, and the tradition is that at the time of the last eruption of Fusiyama the ground rose considerably in the vicinity of the mountain, while there was a corresponding depression of the earth near Kioto, on the other side of the island. Occasionally there are slight rumblings in the interior of Fusiyama, but none of them are serious enough to excite any alarm. From the place where our friends left their horses to the summit the distance is said to be not far from twenty miles, but it is not exactly the equivalent of twenty miles on a level turnpike or a paved street. Frank said it reminded him of a very muddy road somewhere in California, which a traveller described as nine miles long, ten feet wide, and three feet deep; and he thought a fair description of the way up the mountain would include the height and roughness as well as the length. [Illustration: ASCENT OF FUSIYAMA.] The path wound among the rocks and scoriæ, and through the beds of lava. Altogether they found the ascent a most trying one, and sometimes half wished that they had left the visit to Fusiyama out of their calculations when they were planning how to use their time in Japan. But it was too late to turn back now, and they kept on and on, encouraging each other with cheering words, stopping frequently to take breath and to look at the wonderful panorama that was unfolded to their gaze. The air grew light and lighter as they went on, and by-and-by the periods when they halted, panting and half suffocated, became as long as those devoted to climbing. They experienced the same difficulty that all travellers encounter at high elevations, and Fred remembered what he had read of Humboldt's ascent of the high peaks of the Andes, where the lungs seemed ready to burst and the blood spurted from the faces of himself and his companions in consequence of the rarity of the atmosphere.