The smooth jet-black, bright, and dense lava is only found on the mountain itself and in its immediate vicinity. But all lava is not the same: there is jagged, glassy, and porous lava; the former is black, and so is the sand which covers one side of Hecla. The farther the lava and sand are from the mountain, the more they lose this blackness, and their colour plays into iron-colour and even into light-grey; but the lighter-coloured lava generally retains the brightness and smoothness of the black lava. After a troublesome descent, having spent twelve hours on this excursion, we arrived safely at Salsun; and I was on the point of returning to my lodging, somewhat annoyed at the prospect of spending another night in such a hole, when my guide surprised me agreeably by the proposition to return to Struvellir at once. The horses, he said, were sufficiently rested, and I could get a good room there in the priest's house. I soon packed, and in a short time we were again on horseback. The second time I came to the deep Rangaa, I rode across fearlessly, and needed no protection at any side. Such is man: danger only alarms him the first time; when he has safely surmounted it once, he scarcely thinks of it the second time, and wonders how he can have felt any fear. I saw five little trees standing in a field near the stream. The stems of these, which, considering the scarcity of trees in Iceland, may be called remarkable phenomena, were crooked and knotty, but yet six or seven feet high, and about four or five inches in diameter. As my guide had foretold, I found a very comfortable room and a good bed in the priest's house. Herr Horfuson is one of the best men I have ever met with. He eagerly sought opportunities for giving me pleasure, and to him I owe several fine minerals and an Icelandic book of the year 1601. May God reward his kindness and benevolence! July 1st. We retraced our steps as far as the river Huitha, over which we rowed, and then turned in another direction. Our journey led us through beautiful valleys, many of them producing abundance of grass; but unfortunately so much moss grew among it, that these large plains were not available for pastures, and only afforded comfort to travellers by their aspect of cheerfulness. They were quite dry. The valley in which Hjalmholm, our resting-place for this night, was situated, is traversed by a stream of lava, which had, however, been modest enough not to fill up the whole valley, but to leave a space for the pretty stream Elvas, and for some fields and hillocks, on which many cottages stood. It was one of the most populous valleys I had seen in Iceland.