"It's a subject that I may be better able to discuss after I have learned more about it. All I can say at present is that it appears to be a kind of telepathy. You know that their voices seem hardly more cultivated, or capable of regular articulation, than those of mere brutes; and, besides, they have a certain horror of sound. These smiths wear coverings over their ears to minify the noise of their hammering. Yet they are able to converse, partly by physical signs, but more, I am sure, by some means which they possess of transferring thought without the mediation of any senses familiar to us. Sometimes I imagine that their extraordinary eyes play a large part in the phenomenon. But, however that may be, they certainly are able to read some of my thoughts, when we are in close relations and working together. One of them is especially gifted in this way, and what do you think? I have discovered his name!"

"Now, Edmund—" I began incredulously.

"Yes," he persisted, "it's a fact. You are to remember that they do interchange some of their ideas by means of sounds, and they have certain words, among which I am disposed to think are their individual designations. One of these words particularly attracted my attention because I observed that it was always addressed to the person I have just spoken of, and I finally concluded that it was his name. As near as I can imitate it, it sounds something like 'Juba.' So that's what I call him, and he's going to be the chief of the party that I propose to take with us. His services may be invaluable to us."

A great deal more was said on this curious subject, but since we did not arrive at a complete understanding of it until after we had reached the other side of the planet, I shall postpone any further explanation to the chapters which will be devoted to our astonishing adventures on that part of Venus.

My wound, as Edmund had said, was very slight, and the effects of the shock having passed off during the period of my unconsciousness, I was soon busy with the others in making the final preparations for our departure. The sleds were, of course, very rude affairs, but they were also very strong. Among the innumerable stores which Edmund's foresight had led him to put into the car were a number of exceedingly strong but light metallic cables. With these the two sleds were hitched, one behind the other, and a line about a hundred feet long connected them with the car. The latter could thus rise to a considerable height without lifting the sleds from the ground.

The sleds were provisioned from the stores of the natives, and we also took some of their food in the car, not only to eke out our own but because we had come to like it.

Edmund had already chosen the fellows who were to accompany us, and among them were two of the smiths besides Juba. In all they were eight. How he succeeded in persuading them I do not know, but not the slightest objection was apparent on their part, or on the part of their compatriots in the caverns. We were all ready at the predetermined time, and the scene at our departure was a strange one.

At least five hundred natives had assembled in a furry crowd around the entrance to the caverns to see us off. When we started, the fellows on the sleds, being unused to the motion, clung together like so many awkward white bears taking a ride in the circus. Their friends stood about the ill-omened sacrificial altar, waving their long arms, while their huge eyes goggled in the starlight.

Jack, in a burst of enthusiasm, fired four or five parting shots from his pistol. As the reports crashed through the heavy air, you should have seen the crowd vanish down the hole! The sight made me wince, for they must have gone down like a cataract, all heaped together. But they were tough, and I trust no heads were broken. The effect on the eight fellows on the sleds came near being disastrous. I expected to see them leap off and run, which no doubt they would have done if Edmund had not taken, for other reasons, the precaution to tie them fast. But they strained at their bonds, and squealed in terror.

"Give me your pistol!" commanded Edmund, in a voice of thunder, and with blazing eyes.