reaches the body, and immediately changes to a return flow. This current
is but momentary; the patient is seen to move, and the body is once more
quickened by the life spark. The flow of super-radium has conveyed the
spirit of the patient from the small chamber above and released it in
the body as it returned, in exactly the same manner as it does with
light-waves or sound-waves."

"Marvelous!" I gasped, though my mind could only slowly comprehend this
almost miraculous achievement. With such vast scientific resources
nothing seemed impossible to Martians.

Almos had stopped abruptly. A change came over him. His face paled and
his lips set in a hard, determined expression. Instantly I felt my every
faculty strain to the utmost, in response to the new character of this
remarkable being.

Speaking slowly and deliberately, his keen eyes holding mine fascinated
by a strange fire that seemed kindled within them, he said:

"A few words more and we have reached that point at which death may
await the inhabitant of Earth who would proceed farther. A death that no
scientific knowledge can avert. I have tried to school your mind, to the
end that you may fully understand the nature of a desperate undertaking,
never before attempted by any human being, which, if you wish to
attempt, you must risk alone.

"Impelled by a motive that I cannot now explain, I have spanned the
millions of miles of universe lying between us by a bridge of theories,
which, should they prove realities, would enable you to see and live in
another world. Should they prove untenable, however, no power on Earth