ROUTE III.-A SUMMER’S TOUR IN ICELAND. 151 name from the resemblance of this jet-like volcanic product to the black glossy plumage of the raven. On the way will be seen, about two miles north of the NamasharS, a flood of lava that has leaped down the mountain on the west like a cataract. Three hours’ easy riding will bring the party to Leirhnuhr, which in itself is a very low uninteresting eminence, on which are several small solfatarar; but cross to its western side, and then will be seen a view that will never be forgotten ! It is remarkably wild and Plutonic, and the craters there reminded the author of a photograph he once saw—and which, doubtless, most people have seen—of the volcanoes in the moon. They are quite as fantastically shaped, though, of course, not so large as we are told by astronomers those of our satellite are. The points of interest about Krajla are two large craters on its western slope at an altitude of about 1,700 feet above sea-level, now partly filled with water, and a cleft running far into the mountain on the south-west, once a crater rift. The largest of the craters is called Viti (Hell); and, on the 17th May, 1724, such an immense quantity of pumice and ashes was ejected from it that ‘ on the eastern shores of Myvatn the layer of ashes was over three feet deep.’ leirhnuhr erupted in a.d. 1725, 1727, 1728, and 1729. It was active at the time Reylcjahl'rf> farm was destroyed by a lava-flood, but it will be seen that it is impossible this could have flowed from Leirhnuhr, there being a mountain range between it and the site of the fann ; so that previous writers err in stating that the farm was destroyed by lava from this volcano. Its destruction was by lava that issued from volcanic outlets in this intervening range, which are to be seen by following up the floods of igneous rock to their source. Eokty-Seventh Day.—Excursion to the 1875 Lava-flood in the Myvatns draft; and return to ReykjahlrS. This excursion should not be made, if it is purposed to proceed eastward to Sey^isfjor^r, for in that case the lava can be seen en route. The scene of the eruption lies four hours’ ride east of ReykjahlrS. It should be approached by the newly-constructed road over the Orafi, and followed southward for about a mile and a half, and quitted by the old road. This is as much as can be examined in a day’s excursion from Reyhjahli'S. To thoroughly explore this immense lava-flood it would be necessary to camp out on the Johulsa, distant about six miles further east, there being, it is believed, no water nearer than the river. The lava at the northern end of the bed lies in a hollow formed

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