My help, that afternoon, was considerable. I was by far the strongest man in the camp; and, more than that, I was able to move about so much faster than they that I could do things in a few moments that would have taken them many times as long.

Tao personally directed most of my efforts. He told me where to take the things, and I took them, smilingly, and always coming back to him for new orders. I moved so fast, indeed, that my guard had difficulty in keeping close to me. Several times I experimented and found that I could get away from him quite a little distance without a protest, either from him or from Tao.

As it began to grow dark, they lighted up the camp. This was accomplished by little metallic posts that had been set around at intervals. Each had a tiny coil of wire suspended at its top, which became incandescent and threw out a reddish-green light. Around each light was a square black wire cage some three feet in diameter. I conjectured that these lights used the same ray as the projectors, only in a different form, and that the cage was to protect any one from going too close. The light from these illuminators was much the same in aspect as the ray, except that it seemed to diffuse itself readily and carried only a comparatively short distance.

The scene now, under this red-green glare, was weird in the extreme. The work all about me went on steadily. The Mercutians were all dressed in white furry garments now--I concluded because of the cold--with the exception of those who had on the suits and helmets of black.

The reddish-green light made them all appear like little gnomes at work.

Indeed, the whole scene, with its points of color in the darkness, and the huge monstrous shadows all about, was more like some fantastic picture out of a fairy book than a scene on this earth.

Soon after nightfall Tao stopped me, and one of his men brought me something to eat. I still had the slices of bread and meat in my pocket, but, thinking I might need them later on, I kept them there. Tao and I sat down near one of the lights and ate together. We were served by one of the men. My guard still kept close at hand.

The food was nothing more than hard pieces of baked dough and a form of sweet something like chocolate. For drink there was a hot liquid quite comparable to tea. This was served us in small metal cups with handles that seemed to be insulated from the heat.

This meal was brought to us from inside the vehicle. While we were eating I could see many of the Mercutians going inside and coming out with pieces of this food in their hands, eating as they worked. Quite obviously the business of a.s.sembling their apparatus was uppermost in the minds of all of them.

The whole atmosphere about the place, I realized now, in spite of the opposite effect their dragging footsteps gave, was one of feverish activity. When we had eaten Tao seemed willing to sit quiet for a while.

My efforts to talk to him amused us both greatly, and I noticed with satisfaction that he seemed to trust me more and more.

Finally my guard spoke, asking permission, I judged, to leave us and go have his dinner. My heart leaped into my throat as I saw him go, leaving me alone with Tao. I concluded that now, if ever, was my opportunity. Tao trusted me--seemed to like me, in fact. No one else in the camp was paying the least attention to us. If only I could, on some pretext, get myself a reasonable distance away from him I would make a run for it.

I was turning this problem over in my mind when it was unexpectedly solved for me. A low throbbing, growing momentarily louder, sounded from the air--the hum of an airplane motor. I think Tao noticed it first--I saw him c.o.c.k his head to one side, listening.

After a moment, as the sound increased, he climbed to his feet and shouted an order to the man nearest us.

The night had clouded over; it was unusually dark. I knew that a plane without lights was approaching. Work about the camp stopped; every one stood listening. I looked up at the light-ray platform. The two men there were swinging the light back and forth, sweeping the sky.

Suddenly the sound ceased; the plane's motor had been shut off. Almost at the same instant the light-ray picked up the plane. It was several thousand feet in the air and almost over our heads, coming down in a spiral. A moment more and the light-ray swung away.

The plane burst into flame, and I knew it was falling. An explosion sounded near at hand. The camp was in chaos immediately. I faced about to look at Tao; he had disappeared.

I waited no longer. Turning back from the river, I ran at full speed.

CHAPTER IX.

FUTILE ATTACKS.

There seemed to be no pursuit. In a few moments I was clear of the camp and hidden in the darkness of the desert. I ran perhaps half a mile, then I slowed down to a walk, completely winded. Turning, I could see behind me the lights of the camp. I doubted if even now they had missed me. The bomb dropped by the airplane and the plane itself falling almost, in their midst must have plunged them for the time into confusion.

I kept on walking rapidly. The desert here was almost pathless; occasionally I would cross a wandering wagon track, but none of them seemed going in my direction. After a time I was not sure what my direction was; all about me was a luminous darkness--and silence.

I found myself now almost exhausted from my exertions of the day. I decided to go possibly a mile farther--to be well away from the Mercutians--and then to lie down and sleep until daylight.

In about fifteen minutes more I concluded I had gone far enough, and, lying down on the sand, was soon fast asleep. When I awoke it was daylight, with the sun just rising.

With returning consciousness I looked about me in sudden fear, but there was no one in sight. I ate the bread and meat I had in my pocket, and, feeling much refreshed, but thirsty, I started again for Garland.

I made the town soon after noon that day. The little automobile was still standing in the garage, and I started it without trouble. Before I left I went up to the porch of the house.

The bodies of Mercer and the Mercutian were still lying there. I dragged Mercer's body down the steps and put it into the back seat of the car Then I started off. I stuck to the main road, and went through Mantua at top speed, apprehensive that some of the Mercutians might be there. This town, like Garland, was completely burned. Only the chimneys were left standing amid piles of ashes.

At Frannie I took on two pa.s.sengers. There was much curiosity on the part of those I met along here, but I was unwilling to explain, deciding it best to wait and tell my whole story to the military authorities at Billings.

It was early afternoon when I got back to Billings. This was March 12. I turned Mercer's body over to the police, who promptly took me in charge. I gave them a brief outline of what had occurred. General Price, whose command of the United States military operations against the Mercutians was announced to the country two days later, had arrived that morning in Billings by airplane. I demanded to see him, and when my business was explained to him he granted me an immediate interview.

General Price was a man about fifty, a kindly gentleman of the old Southern type, yet of thoroughly military demeanor. I told him everything that had happened to me in detail as complete as I possibly could.

Mercer's body was examined that same afternoon. It was found to have been drilled completely through the chest by a hole about the diameter of a lead pencil. This hole did not seem to have been made by the pa.s.sage of any foreign object, but had more the aspect of a burn. I understood then--Mercer had been killed by a tiny light-ray projector, with a short, effective radius, aimed probably like a revolver.

What I was able to tell General Price about the Mercutians naturally was invaluable to him. He asked me then to remain close to him during the forthcoming operations. We arranged that I was on honor to give nothing out to my paper without his approval.

The situation, as it appeared during the next few days, was not one of grave danger. We were able to gage now with fair probability of correctness the offensive strength of our enemies. They had no means of transportation--could only move from their present position slowly and with extreme difficulty. The possibility of the vehicle itself moving occurred to us; but, as I pointed out, the task of replacing their heavy apparatus in it, and then rea.s.sembling the apparatus in a new position, made such a step impractical.

The only weapon the Mercutians had displayed so far was the light-ray in its several forms. This seemed effective for ten miles at most. That the Mercutians could be attacked by our artillery and destroyed seemed certain.

By the 20th General Price had mobilized some ten thousand men. They encamped on the prairie near Billings. The artillery was moved down to a point near the Wyoming State line, about fifteen miles directly north of the Mercutian camp.

Six days before this, forty-eight hours after I had returned to Billings, observation planes had reported the establishment of two more light-rays, similar in appearance to the first. During the succeeding days others rapidly appeared. By the 20th there were probably thirty of them altogether.

The reports stated that all were set up within a s.p.a.ce seemingly of a few hundred yards. They were of different diameters; some projected in parallel rays, others spread out fan-shaped. These latter appeared not to carry so far. The first one that had appeared, it was judged, had the longest effective radius of them all.

During these days and nights preceding the 20th the light-rockets had been fired with increasing frequency, but none was observed to carry over six or eight miles. By this time the burned area for a circle of ten miles all around the Mercutian camp was entirely depopulated, and no additional destruction was reported.

On the night of the 20th, firing by directions from captive balloons, the United States artillery began its bombardment from the Montana-Wyoming line. After sending over some twenty sh.e.l.ls, the firing ceased. It was learned then that they had proven utterly ineffective. The diverging rays of the Mercutian light had thrown a barrage around their position. The sh.e.l.ls striking the light had all exploded harmlessly in the air.

Subsequent bombardments made that night met with no better success. The fact became obvious then that to artillery fire the Mercutians were impregnable. For several days no further military operations were attempted, with the exception of an occasional sh.e.l.l futilely thrown against the light-rays.

The newspapers during these days were full of discussions--scientific and otherwise--as to how this strange enemy of mankind could be destroyed or dislodged. This was like no other warfare in history. The newspaper statements gave the inference that General Price was entirely at a loss how to proceed.

As a matter of fact, the press was quite correct in that a.s.sumption; and, since the Mercutians were making no offensive moves, General Price decided to do nothing until he was better informed.

I was fortunate enough to be present the next day at a conference the general had with several scientific men who had come to Billings to meet him. It was the opinion of these men of science that no artillery fire could penetrate the light-barrage the Mercutians had thrown about them. No airplane attack was practical, and to attack them from the ground with infantry would be absurd.

On the other hand, it seemed obvious that the Mercutians could make no offensive move either. They had probably already done all the damage that they could. If matters were allowed to remain as they now were--thus avoiding the useless sacrifice of men--inevitably the time would come when the food supply the Mercutians had brought with them would be exhausted.

Meanwhile, if the invaders decided to move in their vehicle to another location, they could not do so suddenly without abandoning their apparatus.

Any lessening in the number of light-rays in operation could be taken as an indication that a move of this kind was in preparation, and the warning would give General Price time to execute any attack that in the meantime might be planned.

It was decided then to remain comparatively inactive and await developments from the opposite side.

During the three months that followed this decision artillery bases were located at intervals on a circ.u.mference of about fifteen miles around the Mercutian center. These were all on desert country. Lines of communication between them were established, and the air above was thoroughly patrolled night and day.

The ten thousand men under General Price it was not thought necessary or advisable to augment. They were deployed around this circ.u.mference in front of the artillery, nearer the ten-mile limit. Machine-gun outposts, manned by volunteers exclusively, were established in Garland, Mantua and other points within the area controlled by the light. These were for the purpose of preventing, or reporting, any possible movements on foot of the Mercutians.

During this time the government was, naturally, subjected to much harsh criticism for its waiting att.i.tude. It was suggested that armored tanks--relics of the World War--could be put into commission. These, under cover of darkness, could be used to rush the Mercutian position. This obviously was an absurd plan, since the light-ray would instantly raise the temperature of the metal composing the car to such a height that the men inside would be killed--not to mention the fact that all explosives in the car would be instantly detonated.