My exhilaration of spirit did not last, for I could not help thinking of our condition. The law of gravitation surely held us, although with less force than we had been accustomed to, on account of the smaller size of the moon; and how were we to get away from it?

I again appealed to my companion.

"I do not like the idea of spending the rest of our lives on the moon, Doctor, but can you tell me how we are to prevent it? Can we ever get back within the earth's attraction again?"

"I have been pondering the subject myself," he replied, "and I think I can give you some hope of seeing home once more. If our old measurements of the moon are correct, and if we are, as I suppose, somewhere near the equator, we must be about fifteen hundred miles from the earth, following the curve of the moon's surface. Now, after we have finished our investigations here, we can start for home on foot. We can cover a good many miles a day, since walking can be no burden here, and we can easily tow our balloon along. As we approach the earth, my impression is that we shall become more and more light-footed, for we shall be gradually getting back to the earth's attraction. Somewhere between this point and our planet there must be a spot where the attraction of both bodies will be equal, and we can stay on the moon or drop off and return to the earth in our balloon as we please."

"What a curious idea," I answered; "and yet, considering the strange behavior of our sand bag, I don't know but you are right. And I have only one suggestion to make; that is, that we start earthward at once and try the experiment. Let the investigations go. If there are any inhabitants here they will never miss us, since we haven't made their acquaintance yet. Science or no science, I object to remaining any longer than necessary in this uncertainty in regard to our future.

You know very well we couldn't live long in this temperature and with nothing for our lungs but what comes through these horrid machines. And what good would come of our discoveries if we are never to get back to the earth again? I profess to have as much courage left as the ordinary mortal would have, but in the present circ.u.mstances I believe no one would blame us for wanting to settle this question at once."

"It would seem a trifle ridiculous," said the doctor in reply to this harangue, "for us to return to our planet without any further effort to accomplish our errand. But I will not deny that I share something of your feeling, and I will start with you right away, on condition that you will return here if we find that I am correct in believing we can leave the moon at our pleasure."

"Agreed," I cried, and we were soon on our way.

So far we had been exposed to the sun and were almost scorched by the intensity of its rays. We had never experienced anything like such heat and would not have supposed the human body could endure it. But now, soon after we had started to find the place where the moon would let go of us, the sun set and, with scarcely a minute's warning, we were plunged into darkness and cold. The darkness was relieved by the exceedingly brilliant appearance of the stars, the sky fairly blazing with them, but the cold was almost unendurable even for the few moments in which we were exposed to it. We secured our car as speedily as possible, climbed into it, and got a little warmth from our gas heater.

These extremes of temperature convinced us that no life such as we were acquainted with could exist a great while on the moon.

We found we could make no progress at all by night. We could only shut ourselves up and wait for the sun to come. In trying to keep warm we would work our air-condensers harder than usual, and the water thus produced we would freeze in little cakes, and have them to help mitigate the burning heat a short time the next day.

The country through which we were traveling was made up of bold mountain peaks and deep ravines. There was no sign of vegetation and not even the soil for it to grow in, but everywhere only hard, metallic rock that showed unmistakably the action of fire.

And so it was with the greatest difficulty that we made our way earthward, although there was so little effort needed in walking. As I pondered the doctor's idea, it seemed to me more and more that he must be right. We were certainly held to the moon where we were by gravitation. It was just as true that near the surface of the earth its superior attraction would draw all objects to itself. Accordingly, if we kept on our way, why should we not in time come to a place where we could throw ourselves once more under the influence of the old earth, now becoming very dear to us?

Thinking chiefly of this subject and talking of it every day, we labored on, and finally were wonderfully encouraged with the belief that we were actually walking easier and everything was becoming lighter. Soon this belief became a certainty, and, since leaping was no effort, we leaped with joy and hope.

And now how shall I describe our sensations as we went bounding along, hardly touching the ground, until we finally came to the place where it was not necessary to touch the ground at all? Now we knew that by going only a little further we should be able to mount our car and set sail for the earth again. But with this knowledge we lost at once much of our desire, and thought we would not hasten our departure. Here we were, absolutely floating in the air, and it maybe believed that the feeling was as delicious as it was unique. Using our hands as fins we could with the slightest effort sail around at pleasure, resting in any position we chose to take, truly a most luxurious experience.

"How shall we make our friends believe all this when we try to tell them about it, Doctor?" said I.

"The best way to make them believe it," he replied, "is to bring them up here and let them try it for themselves. I propose to organize an expedition on our return and bring up a large party. We could manage to land somewhere in this vicinity, I think, instead of going up as far as you and I did. What a place this would be for summer vacations! The moon is a fixture now; it cannot get away. I am sure of that, for the law of gravitation will never release it. So we may as well make what use of it we can, and these delightful sensations will no doubt form the most important discovery that we shall ever make on this dried-up and worn-out satellite. You know many people are willing to put themselves to much inconvenience and to undergo many hardships for the sake of a change from the monotony of home life. If we can induce them to come up here for a few weeks, and if they can endure this rather erratic climate, they will find change enough to break up the monotony for one year, I think."

After enjoying this rare exercise to our content, we began preparing for the night which was now coming on. The doctor had reminded me of my promise to return to our former position on the moon, and we agreed to set out the next day. Having fastened our car securely to the ground, so that we might not drift off toward the earth, we entered it and made ourselves as comfortable as possible.

Our resting place was near the center of what seemed to be an immense crater, and some time before morning we were roused by a violent shaking of the ground beneath us, which startled us beyond expression.

"What's that?" I exclaimed.

"That feels very much like a moon-quake," replied my companion.

I was terribly frightened, but resolved to follow the doctor's example and make light of what we could not help.

So I said:

"But I thought the lunar volcanoes were all dead ages ago. I hope we haven't camped in the crater of one that is likely to go off again."

"My opinion is," answered the doctor, "that there is still water inside the moon which is gradually freezing. That operation would sometimes crack the surface, and this has probably caused the quaking that we have felt."

While we were talking the wind began to blow, and soon, although it was long before time for the sun to rise, we suddenly emerged from darkness into bright sunlight. We sprang up instinctively to look about us and try to discover what this could mean, when what was our consternation to find ourselves adrift!

There, in full view of our wondering eyes, was the whole, round earth, hanging in s.p.a.ce, and where were we? Then we began to realize gradually that the trembling of the ground was the grating of the moon against the earth as it left its resting place, and the wind was caused by our motion.

The novelty of the situation took away for a time the sense of fear, and I exclaimed:

"Another scientific certainty gone to smash! I thought you said the moon could never get away from the earth. What are we going to do now?"

"Well," replied the doctor, "this is certainly something I never dreamed of in my philosophy. I didn't see how the moon could be drawn away from the earth when once actually attached to it, but I suppose the sun and planets all happen to be pulling in one direction just now and are proving too much for the earth's attraction. But what concerns us more at this time is covered by your question, 'What are we going to do now?'

And I will answer that I think we will stick to the moon for a while.

You can see for yourself that we are held here much more firmly than when we were disporting ourselves in the air yesterday, and the earth is now too far away for us to throw ourselves and our balloon within its attraction."

I knew by the feeling of increasing weight that what my companion said must be true, but we could not then appreciate the dreadful nature of our condition, so wrapped up were we in the grandeur of the object before our eyes. To those who have never been on the moon in such circ.u.mstances it will be impossible to adequately describe our feelings as we gazed upon our late home and knew that we were fast drifting away from it.

There the round globe hung, as I had often pictured it in my imagination--oceans and continents, mountains, lakes, and rivers, all spread out before us--the greatest object lesson ever seen by the eye of man. As we studied it, recognizing feature after feature, lands and waters that we knew by their familiar shape, the doctor broke our reverie with these words, evidently with the endeavor to keep up my spirits:

"That looks as natural as a map, doesn't it? You have seen globes with those divisions pictured on them, but there is the globe itself. If our summer tourists could take in this experience also, it would make a vacation worth having. Isn't it grand? I see you are thinking about our personal peril, but I think I know men who would take the risk and put themselves in our place for the sake of this magnificent view."

"If you know of any way to send for one of those friends, I wish you would do so," I replied. "I would willingly give him my place."

It may be believed that we were all this time anxiously watching the earth, and it did not lessen our anxiety to realize that we were traveling very rapidly away from it. I had reached a point now where I did not place much dependence upon the doctor's science, but to get some expression of his thoughts I said to him:

"Well, have you any opinion about our fate? Are we doomed to pa.s.s the remainder of our lives circling around our dear old earth, looking upon her face day by day but never to approach her again?"

"I think you have stated the case about as it is," said he, "if, indeed, this rate of speed does not carry us entirely beyond the earth's attraction, out into illimitable s.p.a.ce."

The thought of such an additional catastrophe silenced me, especially as I could not deny its possibility. Life on the moon, if we could only keep the earth in sight even, seemed almost endurable now, beside the idea that we might be cast out to shift for ourselves, without a tie save such as the universal law of gravitation might find for us somewhere.

It must not be imagined that our conversation was carried on with ease or that we were half enjoying our novel situation. We were simply trying to make the best of a very bad matter. Not long after we had started the wind had taken away the balloon part of our air ship, and now threatened every moment to tear the car from its moorings and end our unhappy career at once. Besides this impending catastrophe, it was with the greatest difficulty that we could get air enough to fill our lungs, but the cold was so intense whenever our side of the moon was turned away from the sun that we needed the severe labor on our condensers to keep us from freezing.

Meantime, our speed increasing every hour, the planet that had once been our home was growing smaller before our eyes. At length we were flying through s.p.a.ce at such a rate that we could not suppress our fears that the terrible suggestion of the doctor's would be realized. We had both made a mental calculation as to how large the earth ought to look from the moon at its normal distance, and as it approached that size we could not hide our anxiety from each other. Without a word from the doctor I could see by his face that hope was fast leaving him, and as we were now going more rapidly than ever I felt that we had nothing to do but accept our fate.

In regard to such intensity of feeling at this stage of our experience, it maybe objected that our condition was hopeless anyway, and it could make no difference whether we remained within the earth's influence or not. But in spite of our desperate situation we had some sentiment remaining. The earth was the only home we had ever known, and I am not ashamed to say that we did not like to lose sight of it; especially as there was not the slightest possibility that we should ever see it again, unless, indeed, our moon should turn into a comet with eccentric orbit, and so bring us back at some future day--a very unlikely occurrence, as all will admit who know anything about moons and comets.

Our speed did not lessen but rather increased as we gradually broke away from the earth's attraction, and the dear old earth was fast becoming a less significant object in our sky. If our situation was lonesome before, it was now desolation itself.

"Doctor," said I, when I could control my emotions enough to speak, "where now?"

"Well," he replied, with a grim attempt at a smile, "my opinion is not worth much in our present strange circ.u.mstances, but it seems to me we are on our way either to the sun or one of the large planets."

I did not reply, and we both soon found it wise to expend no unnecessary breath in talking. The ether was now so thin that it took oceans of it, literally, to make enough air to keep us alive.

Our provisions were nearly exhausted, our strength was failing, and I really believe we would not have lived many days had not something occurred to divert our minds and to relieve some of our physical discomforts.

CHAPTER IV.

AND ONE WOMAN.