and crag. Presently this faded out and there reigned complete darkness and complete silence.
On the following morning, when the DeLong Geographical Expedition was about to start back for civilization they saw on the scene of the conflict between Pablo and the yellow soldiers, where the half-breed had stabbed his captors, a number of dark green stains.
On analysis this green also proved to be chlorophyll.
A communication from Gilbert DeLong, President of the DeLong Geographical Society, to the Trustees of the Nobel Prize Foundation, Stockholm, Sweden:
Sirs: It is my privilege to bring to your attention the extraordinary journal of the DeLong Geographical Expedition into that unmapped region of Peru, in the department of Ayacucho, known as the Valle de Rio Infiernillo.
Enclosed with this journal is M. Demetriovich's able presentation of the theory that the dirigible observed in that valley was operated by the Bolshevist government of either Austria or Russia.
Also enclosed is the monograph of Mr. Herbert M. Pethwick, C.E., who presents a most interesting speculation tending to prove that the strange aircraft was a development made independently of the known civilized world by an offshoot of the ancient Incan race, depatriated by the Spaniards in 1553 A. D.
To my mind, both of these hypotheses, although brilliantly maintained, fail to take into consideration two highly significant facts which are set forth, but not greatly stressed in the record of the expedition as kept by Mr. James B. Standifer, Sec.
These two facts are, first, the serial number which served as a name of the man from One, and the other fact, that in both eases where a man from One was wounded he bled what for want of a better term must be called chlorophyllaceous blood.
From few other writers than Mr. Standifer would I accept so bizarre a statement of fact, but his power of exact and minute observation is so well attested by his well-known work, “Reindeer in Iceland,” that I dare not question his strict adherence to truth.
The phenomena set forth in the journal happened. That is beyond cavil. The problem for the scientific world is their interpretation.
In handling this problem, I shall not only assume that the journal is accurate, but I shall still further assume that the being known in the record as Mr. Three told the precise truth in every statement ascribed to him.
I have every confidence in Mr. Three's probity for several reasons. First, he has no motive for prevarication. Second, a man who habitually communicates with his fellows by telepathy would not be accustomed to falsehood, since falsehood is physically impossible when a man's mind lies before his companions like an open book. Third, to a man habitually accustomed to truth, lying is a difficult and uncongenial labor. In brief, lying is like any other art; it requires practise to do it well.
In regard to the serial number, both of the above mentioned writers apparently fail to see the enormous problem it possesses. As for the chlorophyllaceous blood, our authors pass it with a vague surmise that somehow it is used in extracting gold, when the whole object of the expedition, according to Mr. Three, was not gold but radium.
Because my esteemed colleagues neglected these two critical points, their whole theories, as ably and ingeniously defended as they are, to my mind collapse into mere brilliant sophisms.
In the brief analysis herewith presented I shall touch on a number of points, among which the questions evoked by the serial number and the chlorophyll blood will be noticed in their proper places.
First, then, Mr. Three himself states that the object of the expedition was the extraction of radium from the pitchblende in the Infernal Valley. The use the men from One made of this radium was demonstrated at the departure of the dirigible, for that vessel must have been propelled by the emanations of radium. According to the description of Mr. Standifer, the ship used no screw propellers or tractors, but a powerful emanation of radium from under its stern shot the great metal cylinder upward exactly as powder propels a skyrocket.
That radium would possess such power is well known. It has been calculated that two pounds of radium would possess sufficient force to swing the earth out of its orbit.
With such power the airship would be capable of enormous speed. A high speed was guessed by M. Demetriovich when he observed the small controlling plane. However, the vastness of this speed was demonstrated by Mr. Standifer in the last paragraph of his account, by his curious observation that the airship, as seen against the evening sky, turned violet, indigo blue, green, yellow, orange, red and then was lost. In other words, it ran through the whole spectrum from the most rapid to the lowest vibrations per second and then vanished.
What is the meaning of this significant detail?
Allow me to recall an analogy in sound. The tone of a bell on a train departing at high speed becomes lower in pitch. This is because the vibrations reach the ear at longer intervals.
Apply that to the change of light observed on the airship. Then the vessel must have been withdrawing at such a speed that it lowered the “pitch” of light vibrations from white to red and finally cancelled its light in blackness.
The only conclusion to be drawn from this is that at the time of the light's extinction, the mysterious metal cylinder was hurtling through space at the speed of light itself; that is to say, at a speed of one hundred and eighty-six thousand miles per second.
Observe that I say, “space,” not air. In the first place such a speed in air would fuse any metal. But there is another and a better reason.
It requires the average human eye one-twentieth of a second to perceive a color change. If Mr. Standifer had observed these color changes at the highest possible nerve rate, the operation would have acquired seven-twentieths of a second. Let
