I handed him my pass. He read it carefully a couple of times. "It doesn't seem possible," he said, "but then your swordsmanship didn't seem possible either. It is hard for me to believe it yet. Why, Nolat was considered the best swordsman in Kamtol; and you made him look like an old woman with one leg. Why do you want to come in here?"

"I want to learn to fly," I said, naively.

He slapped his thighs and laughed at that. "Either you are foolish, or you think we First Born are, if you have an idea that we would teach a slave to fly."

"Well, I'd like to come in and look at the fliers anyway," I said. "That wouldn't do any harm. I've always been interested in them."

He thought a moment; then he said, "Nolat is my best friend; you might have killed him, but you refused. For that I am going to let you come in."

"Thank you," I said.

The first floor of the building was largely given over to shops where fliers were being built or repaired. The second and third floors were packed with fliers, mostly the small, swift ones for which the Black Pirates of Barsoom are noted. On the roof were four large battleships; and, parked under them, were a number of small fliers for which there was evidently no room on the floors below.

The building must have covered several acres; so there were an enormous number of planes hangared there. I could see them now, as I had seen them years before, swarming like angry mosquitoes over the Golden Cliffs of the Holy Therns; but what were they doing here? I had supposed that the First Born lived only in the Valley Dor, although the majority of Barsoomians still believe that they come from Thuria, the nearer moon. That theory I had seen refuted the time that Xodar, a Black Pirate, had nearly succumbed from lack of oxygen when I had flown too high while escaping from them, that time that Thuvia and I had escaped the Therns, during their battle with the Black Pirates. If a man can't live without oxygen, he can't fly back and forth between Thuria and Barsoom in an open flier.

The officer had sent a warrior along, with me, as a precaution against sabotage, I suppose; and I asked this fellow why I had seen no ships in the air since I had come, except the few I had seen this day.

"We fly mostly at night," he replied, "so that our enemies cannot see where we take off from, nor where we land. Those that you saw coming in a few minutes ago were visitors from Dor. That may mean that we are going to war, and I hope so. We haven't raided any cities for a long time. If it's to be a big raid, those from Dor and from Kamtol band together."

Some Black Pirates from the Valley Dor! Now, indeed, I might be recognized.

As I walked away from the hangar building, I turned and looked back, studying every detail of the architecture; then I walked around the entire building, which covered a whole square, with avenues on all four sides. Like nearly all Martian buildings, this one was highly ornamented with deep carvings. It stood in a rather poor section of the city, although not far from the palace; and was surrounded by small and modest homes. They were probably the homes of the artisans employed around the hangar. A little farther from the hangar a section of small shops began; and as I passed along, looking at the wares displayed, I saw something which brought me to a sudden stop, for it suggested a new accessory to my rapidly formulating plans for escape from the Valley of the First Born-from which none ever escaped. It is sometimes well not to be too greatly constrained by precedent.

I entered the shop and asked the proprietor the price of the article I wished.

It was only three teepi, the equivalent of about thirty cents in United States money; but with the information came the realization that I had none of the money of the First Born.

The medium of exchange upon Mars is not dissimilar to our own, except that the coins are oval; and there are only three; the pi, pronounced pi; worth about one cent; the teepi, ten cents; and the tanpi, one dollar. These coins are oval; one of bronze, one of silver, and one of gold. Paper money is issued by individuals, much as we write a check, and is redeemed by the individual twice yearly. If a man issues more than he can redeem, the government pays his creditors in full; and the debtor works out the amount upon the farms, or in the mines, which are government owned.

I had with me money of Helium to the value of some fifty tanpi, and I asked the proprietor if he would accept a larger amount than the value of the article in foreign coin. As the value of the metal is equal to the value of the coin, he gladly accepted one dollar in gold for what was worth thirty cents in silver; and I placed my purchase in my pocket pouch and departed.

As I approached the palace, I saw a white-skinned man ahead of me carrying a heavy burden on his back. Now, as far as I knew, there was only one other white-skinned man in Kamtol; and that was Pan Dan Chee; so I hastened to overtake him.

Sure enough, it was the Orovar from Horz; and when I came up behind him and called him by name, he almost dropped his burden, so surprised was he.

"John Carter!" he exclaimed.

"Hush!" I cautioned; "my name is Dotar Sojat. If the First Born knew that John Carter was in Kamtol I hate to think what would happen to him. Tell me about yourself. What has happened to you since I last saw you?"

"I was purchased by Dator Nastor, who has the reputation of being the hardest master in Kamtol. He is also the meanest; he bought me only because he could buy me cheap, and he made them throw in Jad-han for good measure. He works us day and night, and feeds us very little-and poor food at that. Since he lost a hundred thousand tanpi to Xaxak, it has been almost like working for a maniac.

"By my first ancestor!" he exclaimed suddenly; "so it was you who defeated Nolat and caused Nastor to lose all that money! I didn't realize it until just now. They said the slave who won the contest was named Dotar Sojat, and that meant nothing to me until now-and I was a little slow in getting it, at that."

"Have you seen Llana of Gathol?" I asked him. "She was in Nastor's loge at the Games; so I, presume she was purchased by him."

"Yes, but I have not seen her," replied Pan Dan Chee; "however, I have heard gossip in the slaves' quarters; and I am much worried by what is being whispered about the palace."

"What have you heard? I felt that she was in danger when I saw her in Nastor's loge. She is too beautiful to be safe."

"She was safe enough at first," said Pan Dan Chee, "as she was originally purchased by Nastor's principal wife. Everything was comparatively well for her until Nastor got a good look at her at the Games; then he tried to buy her from his wife. But she, Van-tija, refused to sell. Nastor was furious, and told Van-tija that he would take Llana anyway, so Van-tija has locked her in an apartment at the top of the tower of her own part of the palace, and has placed her personal guards at the only entrance. There is the tower, there," he said, pointing; "perhaps Llana of Gathol is looking down at us now."

As I looked up at the tower, I saw that it rose above a palace which stood directly across the large central plaza from that of the jeddak; and I saw something else-I saw the windows of Llana's apartments were not barred.

"Do you think that Llana is in any immediate danger?" asked.

"Yes," he replied, "I do. It is rumored in the palace that Nastor is going to lead warriors to Van-tija's section of the palace and attempt to take the tower by storm."

"Then we have no time to lose, Pan Dan Chee. We must act tonight."

"But what can we two slaves do?" he demanded. "Even if we succeeded in getting Llana out of the tower, we could never escape from the Valley of the First Born. Do not forget the skeletons, John Carter."