At first, as I have hinted in my foreword to the published diary, I thought that the whole affair might well have been devised as a somewhat elaborate practical joke; but this theory became less and less tenable as weeks and months went by and linked themselves slowly into a year, without the reappearance of the presumptive jokers.

Now, at last, I can testify to the truth of all that Angarth wrote—and more. For I, too, have been in Ydmos, the City of Singing Flame, and have known also the supernal glories and raptures of the Inner Dimension. And of these I must tell, however falteringly and stumblingly, with mere human words, ere the vision fades. For these are things which neither I nor any other shall behold or experience again: since Ydmos itself is now a riven ruin, and the Temple of the Flame has been blasted to its foundations in the basic rock, and the fountain of singing fire has been stricken at its source, and the Inner Dimension has perished like a broken bubble, in the great war that was made upon Ydmos by the rulers of the Outer Lands….

After editing and publishing Angarth’s journal, I was unable to forget the peculiar and tantalizing problems it had raised. The vague but infinitely suggestive vistas opened by the tale were such as to haunt my imagination recurrently with a hint of half-revealed or hidden mysteries; and I was troubled by the possibility of some great mystic meaning behind it all—some cosmic actuality of which the narrator had perceived merely the external veils and fringes.

As time went on, I found myself pondering it perpetually, and more and more I was possessed by an overwhelming wonder, and a sense of something which no mere fiction-weaver would have been likely to invent through the unassisted workings of his own fantasy.

In the early summer of 1931, after finishing a new novel of interplanetary adventure, I felt able for the first time to take the necessary leisure for the execution of a project that had often occurred to me. Putting all my affairs in order, and knitting all the loose ends of my literary labors and correspondence, in case I should not return, I left Auburn ostensibly for a week’s vacation, and actually went to Summit with the idea of investigating closely the milieu in which Angarth and Ebbonly had disappeared from human ken.

With strange emotions, I visited the forsaken cabin south of Crater Ridge that had been occupied by Angarth, and saw the rough, home-made table of pine boards upon which my friend had written his journal and had left the sealed package containing it to be forwarded to me after his departure.

There was a weird and brooding loneliness about the place, as if the non-human infinitudes had already claimed it for their own. The unlocked door had sagged inward from the pressure of high-piled winter snows, and fir-needles had sifted across the sill to strew the unswept floor. Somehow, I know not why, the bizarre narrative became more real and more credible to me, while I stood there, as if an occult intimation of all that had happened to its author still lingered around the cabin.

This mysterious intimation grew stronger when I came to visit Crater Ridge itself, and to search amid its miles of pseudo-volcanic rubble for the two boulders so explicitly described by Angarth as having a likeness to the pedestals of ruined columns.

Many of my readers, no doubt, will remember his description of the Ridge; and there is no need to enlarge upon it with reiterative detail, other than that which bears upon my own adventures.

Following the northward path which Angarth must have taken from his cabin, and trying to retrace his wanderings on the long, barren hill, I combed it thoroughly from end to end and from side to side, since he had not specified the location of the boulders. After two mornings spent in this manner without result, I was almost ready to abandon the quest and dismiss the queer, soapy, greenish-grey column-ends as one of Angarth’s most provocative and deceptive fictions.

It must have been the formless, haunting intuition of which I have spoken, that made me renew the search on the third morning. This time, after crossing and re-crossing the hill-top for an hour or more, and weaving tortuously to and fro among the cicada-haunted wild currant bushes and sun-flowers on the dusty slopes, I came at last to an open, circular, rock-surrounded space that was totally unfamiliar, and which I had somehow missed it in all my previous roamings. It was the place of which Angarth had told; and I saw with an inexpressible thrill the two rounded, worn-looking boulders that were situated in the center of the ring.

I believe that I trembled a little with excitement as I went forward to inspect the curious stones. Bending over, but not daring to enter the bare, pebbly space between them, I touched one of them with my hand, and received a sensation of preternatural smoothness, together with a coolness that was inexplicable, considering that the boulders and the soil about them must have lain unshaded from the sultry August sun for many hours.

From that moment, I became fully persuaded that Angarth’s account was no mere fable. Just why I should have felt so certain of this, I am powerless to say. But it seemed to me that I stood on the threshold of an ultramundane mystery, on the brink of uncharted gulfs; and I looked about at the familiar Sierran valleys and mountains, wondering that they still preserved their wonted outlines, and were still unchanged by the contiguity of alien worlds, were still untouched by the luminous glories of arcanic dimensions.

Being convinced that I had indeed found the gateway between the worlds, I was prompted to strange reflections. What, and where, was this other sphere to which my friend had attained entrance? Was it near at hand, like a secret room in the structure of space? Or was it, in reality, millions or trillions of light-years away by the reckoning of astronomic distance, in a planet of some ulterior galaxy? After all, we know little or nothing of the actual nature of space; and perhaps, in some way that we cannot imagine, the infinite is doubled upon itself in places, with dimensional folds and tucks, and short-cuts whereby the distance to Algenib or Aldebaran is but a step. Perhaps, also, there is more than one infinity. The spatial “flaw” into which Angarth had fallen might well be a sort of super-dimension, abridging the cosmic intervals and connecting universe with universe.

However, because of this very certitude that I had found the inter-spheric portals, and could follow Angarth and Ebbonly if I so desired, I hesitated before trying the experiment, mindful of the mystic danger and irrefragable lure that had overcome the others. I was consumed by imaginative curiosity, by an avid, well-nigh feverish longing to behold the wonders of this exotic realm; but I did not purpose to become a victim to the opiate power and fascination of the Singing Flame.

I stood for a long time, eyeing the odd boulders and the barren, pebble-littered spot that gave admission to the unknown. At length, I went away, deciding to defer my venture till the following morn. Visualizing the weird doom to which the others had gone so voluntarily, and even gladly, I must confess that I was afraid. On the other hand, I was drawn by the fateful allurement that leads an explorer into far places… and perhaps by something more than this.

I slept badly that night, with nerves and brain excited by formless, glowing premonitions, by intimations of half-conceived perils and splendors and vastnesses. Early the next morning, while the sun was still hanging above the Nevada Mountains, I returned to Crater Ridge.

I carried a strong hunting-knife and a Colt revolver, and wore a filled cartridge-belt, and also a knapsack containing sandwiches and a thermos bottle of coffee. Before starting, I had stuffed my ears tightly with cotton soaked in a new anaesthetic fluid, mild but efficacious, which would serve to deafen me completely for many hours. In this way, I felt that I should be immune to the demoralizing music of the fiery fountain.