Almuric by Robert E. Howard

It was not my original intention ever to divulge the whereabouts of Esau Cairn, or the mystery surrounding him. My change of mind was brought about by Cairn himself, who retained a perhaps natural and human desire to give his strange story to the world which had disowned him and whose members can now never reach him. What he wishes to tell is his affair. One phase of my part of the transaction I refuse to divulge; I will not make public the means by which I transported Esau Cairn from his native Earth to a planet in a solar system undreamed of by even the wildest astronomical theorists. Nor will I divulge by what means I later achieved communication with him, and heard his story from his own lips, whispering ghostily across the cosmos.

Let me say that it was not premeditated. I stumbled upon the Great Secret quite by accident in the midst of a scientific experiment, and never thought of putting it to any practical use, until that night when Esau Cairn groped his way into my darkened observatory, a hunted man, with the blood of a human being on his hands. It was chance led him there, the blind instinct of the hunted thing to find a den wherein to turn at bay.