"There!" said Tun Gan. "What are you going to do about that?"

"There is nothing I can do about it," I said. "There is nothing that anybody can do about it. I doubt that Ras Thavas could do anything. He has created a force that he probably couldn't control himself, once it got away from him."

"What will be the end of it?" asked Tun Gan.

"If it doesn't stop growing it will crowd every other living thing out of Morbus. It grows and grows and feeds upon itself. It might even envelop the whole world. What is there to stop it?"

Tun Gan shook his head. He didn't know. "Maybe Ay-mad could stop it," he suggested. "He is jeddak."

"Send for him," I said. "Tell him that something has happened here in the laboratory building that I wish him to see for himself." For once in my life I was anxious to shift responsibility to another's shoulders, for I was helpless in the face of such an emergency as had never before confronted any human being since the creation of the world.

Well, in due time Ay-mad came; and when he had looked out of the window and listened to my explanation of the phenomenon he just tossed the whole responsibility back into my lap.

"You wanted to have full charge of the laboratory," he said, "and I put you in charge. This is your problem, not mine." With that he turned away and went back to the palace. By this time the entire floor of the courtyard was covered with the wriggling, jibbering mass; and more was oozing down from the broken window above.

Well, I thought, it will take a long time to fill this courtyard. In the meantime I may think of something to do, and with that I returned to my quarters and sat looking despondently out of the window across the walls of Morbus at the dismal Toonolian Marshes that spread in all directions as far as the eye could see. They reminded me of the spreading mass in the courtyard beneath No. 4 vat room; so I closed my eyes to shut out the sight.

For some reason, the plans of the building, that I had found in Ras Thavas's desk, came to my mind; then I recalled the trip from Helium with The Warlord.

That reminded me of my own body, for I could see it now, trapped in the harness of The Warlord's Guards. Where was it? I had last seen it on the ersite slab in the small laboratory of Ras Thavas. That slab was empty now, and at its foot hung a single sheet with the cryptic numbers 3-17 written on it. 3-17! What in the world could that signify?

Suddenly my mind was galvanized into action. Those numbers might have definite significance! I leaped to my feet and hurried to Ras Thavas's little study. Here I dragged out the plans of the building and spread them out, turning back the pages to the floor plan of the pits. I ran my finger quickly down corridor 3 to 17. Could that be the answer? I examined the plans more carefully. In one corner of cell 17 was a tiny circle. There were no circles in any of the other cells.

What did that circle mean? Did it mean anything? Did the «3-17» written on the sheet at the foot of the table on which my body had lain have any connection with a corridor and cell number? There was but one way to answer these questions. I rose hurriedly from the desk and went out into the corridor.

Passing hormads and officers, I made my way to the ramp that led to the lower floor and the pits. I carried the map of the pits indelibly imprinted upon my memory. I could have found 3-17 with my eyes shut.

The corridors and the cells were plainly numbered; so that I had no difficulty in finding cell 17 in corridor 3. I tried the door. It was locked! How stupid of me. I might have known that it would be locked if it hid the thing for which I sought. I knew where Ras Thavas kept the keys to the various locks in the laboratory building; so now I retraced my steps, but this time I saw several officers look at me in what I imagined was a suspicious manner. Spies, I thought; some of Ay-mad's spies. I should have to be careful. That would mean further delay.

Now I moved listlessly. I pretended to inspect one of the vat rooms. I sent one of the officers I had long suspicioned on an errand. I went to a window and looked out. Eventually I made my leisurely way to the study; and here I had no difficulty in finding the key I sought, as Ras Thavas was meticulously methodical in all he did; and each key had been numbered and marked.

Now I must return to the pits without arousing suspicion. Once again I sauntered out through the corridors and rooms, and finally made my way to the ramp.

Unobserved, I descended. At last I stood again before the door to 3-17. I fitted the key, took a last look up and down the corridor to assure myself that I was alone, and then pushed the door open. Like the corridors, the cell was lighted by means of the everlasting radium bulbs commonly used on Barsoom.

Directly before me, on a table, lay my body. I entered the cell and closed the door behind me. Yes, there was my body; and there the vessel containing my blood. We were all together again, my body, my blood, and my brains; but we were still as far apart as the poles. Only Ras Thavas could bring us together as an entity, and Ras Thavas was gone.

I stood for a long time looking at my body. I had never been a vain man, but when I compared it with the horrid thing that my brain now animated it seemed the most beautiful thing I had ever beheld. I thought of Janai in her apartments above, and cursed myself for a fool for ever giving up the body that she might have loved for one that no creature could love.

But such repining was of no avail, and I forced myself to think of other things.

The little circle that appeared in the plans of cell 17 came to my mind, and I walked to the corner of the room where it had indicated that something might be found different from what was in the construction of the other cells in the pits. There was something there. It was scarcely visible, but it was there-a faint line marking a circle about two feet in diameter. I got down on my hands and knees and examined it. At one side of it was a small indentation. The thing, looked as though it might be a cunningly fitted trap door and the indentation a place to pry it open. I inserted the point of my dagger and pried. The trap rose easily. Presently it was high enough to permit me to get my fingers beneath it, and in another moment I had lifted it to one side revealing a dark void beneath.

What lay there? What was the purpose of the opening?

There was only one way to find out. I lowered my body through the aperture which was but barely large enough to accommodate my gross carcass. When I was hanging at the full length of my long right arm my toes just touched something solid. I hoped it was the bottom of the pit, and let go.

I stood now on a solid flooring. The little light that came through the aperture above me showed me a narrow corridor leading away into utter darkness. There was nothing for me to do but explore, now that I had come this far. I wished that I might have returned the cover to its place; so that if any one should come to the cell they might not discover the trap door; then I commenced to wonder just how anyone could get out of this place if the cover were closed above them.

Open, a man could jump for the edge of the opening and draw himself up; but closed, he simply couldn't get out.

There was something wrong here. There must be some other way. I commenced to grope about searching for it, whatever it was; and at last I found it-a pole resting on pegs near the top of the corridor. By resting it against the edge of the aperture, I climbed up and dragged the cover almost into position; then I descended and, with the pole, poked the cover into place.

Now I started groping my way through utter darkness along the corridor. I felt ahead with a toe before taking a single step, and I kept my, hands on both sides of the corridor lest I miss some forking or crossing corridor that might throw me off my track when I returned-if ever I did return. That thought gave me pause. What would happen to Janai if I failed to return? Perhaps I shouldn't continue on this new adventure. Perhaps I should go back. But no. After all, it was in her interests that I was thus exploring beneath the pits of Morbus.