Coming to a great quadrangular enclosure in the lava walls we stopped to rest and to feed the ponies, as this is the last spot where grass can be obtained. The great ridge to the right which is deep red and compact like jasper is the lava of the recent eruption. It terminates in a fissure in the mountain side far below the summit. The wall to the left turned in front of us in a long sweep to join the base of the above mentioned rift. From our position no egress appeared from this formidable _cul de sac_ and we expected that the guides would leave the ponies here with the ascent just begun and that we would have this tangled mass of lava ropes to scale as best we could. A mile further on a twist in the flow, where the viscid lava rose in a billow and broke back upon itself, we found a precarious egress which the ponies negotiated with the agility and sure-footedness of mountain sheep. We dodged about between the basalt fragments and over the ash ridges rising higher and higher with every turn. The travelling is somewhat dangerous in places, as I had occasion to testify, the lava is full of cracks and holes and the lichens have woven a treacherous carpet over this floor. High above loom the red walls and the obsidian points bristling like a _cheval-de-frise_. We had not yet reached the snow line but the fog hung low upon the shoulders of the mountain and we despaired of even a momentary lifting of the mantle should we gain the summit. We next came to an ash ridge so steep that we dismounted and sometimes walking and sometimes riding we gained the top of this ridge, an elevation of 2,000 feet above the sea. Descending into a wild glen of chaotic fragments, like huge masses of broken glass, we found a patch of level sand and here we left the ponies. We tied them in pairs, the head of one to the tail of the other and here we left the poor beasts without food or water till six at night to shiver in the blast.