On the morrow the Sage led them straight into the rock-sea whereas it seemed to them at first that he was but bringing them into a blind alley; but at the end of the bight the rock-wall was broken down into a long scree of black stones. There the Sage bade Ralph and Ursula dismount (as for him he had been going afoot ever since that first day) and they led the horses up the said scree, which was a hard business, as they were no mountain beasts. And when they were atop of the scree it was harder yet to get them down, for on that side it was steeper; but at last they brought it about, and came down into a little grassy plain or isle in the rock sea, which narrowed toward the eastern end, and the rocks on either side were smooth and glossy, as if the heat had gone out of them suddenly, when the earth-fires had ceased in the mountains.  
Now the Sage showed them on a certain rock a sign cut, whereof they had learned in the book aforesaid, to wit, a sword crossed by a three-leaved bough; and they knew by the book that they should press on through the rock-sea nowhere, either going or returning, save where they should see this token.
 
Now when they came to the narrow end of the plain they found still a wide way between the rock-walls, that whiles widened out, and whiles drew in again. Whiles withal were screes across the path, and little waters that ran out of the lava and into it again, and great blocks of fallen stone, sometimes as big as a husbandman's cot, that wind and weather had rent from the rocks; and all these things stayed them somewhat. But they went on merrily, albeit their road winded so much, that the Sage told them, when evening was, that for their diligence they had but come a few short miles as the crow flies.
 
Many wild things there were, both beast and fowl, in these islands and bridges of the rock-sea, hares and conies to wit, a many, and heathfowl, and here and there a red fox lurking about the crannies of the rock-wall. Ralph shot a brace of conies with his Turk bow, and whereas there were bushes growing in the chinks, and no lack of whin and ling, they had firing enough, and supped off this venison of the rocks.
 
So passed that day and two days more, and naught befell, save that on the midnight of the first day of their wending the rock-sea, Ralph awoke and saw the sky all ablaze with other light than that of the moon; so he arose and went hastily to the Sage, and took him by the shoulder, and bid him awake; "For meseems the sky is afire, and perchance the foe is upon us."
 
The Sage awoke and opened his eyes, and rose on his elbow and looked around sleepily; then he said laughing: "It is naught, fair lord, thou mayst lie down and sleep out the remnant of the night, and thou also, maiden: this is but an earth-fire breaking out on the flank of the mountains; it may be far away hence. Now ye see that he may not scale the rocks about us here without toil; but to-morrow night we may climb up somewhere and look on what is toward."
 
So Ralph lay down and Ursula also, but Ralph lay long awake watching the light above him, which grew fiercer and redder in the hours betwixt moonset and daybreak, when he fell asleep, and woke not again till the sun was high.
 
But on the next day as they went, the aspect of the rock-sea about them changed: for the rocks were not so smooth and shining and orderly, but rose up in confused heaps all clotted together by the burning, like to clinkers out of some monstrous forge of the earth-giants, so that their way was naught so clear as it had been, but was rather a maze of jagged stone. But the Sage led through it all unfumbling, and moreover now and again they came on that carven token of the sword and the bough. Night fell, and as it grew dark they saw the glaring of the earth-fires again; and when they were rested, and had done their meat, the Sage said: "Come now with me, for hard by is there a place as it were a stair that goeth to the top of a great rock, let us climb it and look about us."
 
So did they, and the head of the rock was higher than the main face of the rock-sea, so that they could see afar. Thence they looked north and beheld afar off a very pillar of fire rising up from a ness of the mountain wall, and seeming as if it bore up a black roof of smoke; and the huge wall gleamed grey, because of its light, and it cast a ray of light across the rock-sea as the moon doth over the waters of the............