The Outer Beings are perhaps the most marvellous organic things in or beyond all space and time – members of a cosmos-wide race of which all other life-forms are merely degenerate variants. They are more vegetable than animal, if these terms can be applied to the sort of matter composing them, and have a somewhat fungoid structure, though the presence of a chlorophyll-like substance and a very singular nutritive system differentiate them altogether from true cormophytic fungi. Indeed, the type is composed of a form of matter totally alien to our part of space – with electrons having a wholly different vibration-rate. That is why the beings cannot be photographed on the ordinary camera films and plates of our known universe, even though our eyes can see them. With proper knowledge, however, any good chemist could make a photographic emulsion which would record their images.

The genus is unique in its ability to traverse the heatless and airless interstellar void in full corporeal form, and some of its variants cannot do this without mechanical aid or curious surgical transpositions. Only a few species have the ether-resisting wings characteristic of the Vermont variety. Those inhabiting certain remote peaks in the Old World were brought in other ways. Their external resemblance to animal life, and to the sort of structure we understand as material, is a matter of parallel evolution rather than of close kinship. Their brain-capacity exceeds that of any other surviving life-form, although the winged types of our hill country are by no means the most highly developed. Telepathy is their usual means of discourse, though we have rudimentary vocal organs which, after a slight operation (for surgery is an incredibly expert and everyday thing among them), can roughly duplicate the speech of such types of organism as still use speech.

Their main immediate abode is a still undiscovered and almost lightless planet at the very edge of our solar system – beyond Neptune, and the ninth in distance from the sun. It is, as we have inferred, the object mystically hinted at as ‘Yuggoth’ in certain ancient and forbidden writings; and it will soon be the scene of a strange focusing of thought upon our world in an effort to facilitate mental rapport. I would not be surprised if astronomers become sufficiently sensitive to these thought-currents to discover Yuggoth when the Outer Ones wish them to do so. But Yuggoth, of course, is only the stepping-stone. The main body of the beings inhabits strangely organised abysses wholly beyond the utmost reach of any human imagination. The space-time globule, which we realise as the totality of all cosmic entity, is only an atom in the genuine infinity which is theirs. And as much of this infinity as any human brain can hold is eventually to be opened up to me, as it has been to not more than fifty other men since the human race has existed.