To the north, however, it did come to an end, for there, as I judged fifty or sixty miles away, rose the grim outline of what looked like a huge fortress, which I knew must be one of those extraordinary mountain formations, probably owing their origin to volcanic action, that are to be met with here and there in the vast expanses of Central and Eastern Africa. Being so distant it was impossible to estimate its size, which I guessed must be enormous, but in looking at it I bethought me of that great mountain in which Zikali said the marvellous white Queen lived, and wondered whether it could be the same, as from my memory of his map upon the ashes, it well might be, that is, if such a place existed at all. If so the map had shown it as surrounded by swamps and—well, surely that mist hid the face of a mighty swamp?

It did indeed, since before nightfall, following the spoor of those Amahagger, we had plunged into a morass so vast that in all my experience I have never seen or heard of its like. It was a veritable ocean of papyrus and other reeds, some of them a dozen or more feet high, so that it was impossible to see a yard in any direction.

Here it was that the Amahagger ahead of us proved our salvation, since without them to guide us we must soon have perished. For through that gigantic swamp there ran a road, as I think an ancient road, since in one or two places I saw stone work which must have been laid by man. Yet it was not a road which it would have been possible to follow without a guide, seeing that it also was overgrown with reeds. Indeed, the only difference between it and the surrounding swamp was that on the road the soil was comparatively firm, that is to say, one seldom sank into it above the knee, whereas on either side of it quagmires were often apparently bottomless, and what is more, partook of the nature of quicksand.

This we found out soon after we entered the swamp, since Robertson, pushing forward with the fierce eagerness which seemed to consume him, neglected to keep his eye upon the spoor and stepped off the edge on to land that appeared to be exactly similar to its surface. Instantly he began to sink in greasy and tenacious mud. Umslopogaas and I were only twenty yards behind, yet by the time we reached him in answer to his shouts, already he was engulfed up to his middle and going down so rapidly that in another minute he would have vanished altogether. Well, we got him out but not with ease, for that mud clung to him like the tentacles of an octopus. After this we were more careful.

Nor did this road run straight; on the contrary, it curved about and sometimes turned at right angles, doubtless to avoid a piece of swamp over which it had proved impossible for the ancients to construct a causeway, or to follow some out-crop of harder soil beneath.