As those words broke upon the ears of Jason Gridley he reacted almost as to the shock of a physical blow. He was glad that no one chanced to be looking at him at the time and instantly he regained his composure, but it left him with a distinct feeling of injury. They had all known it and none of them had told him. He was almost angry at them until it occurred to him that they had all probably assumed that he had known it too, and yet try as he would he could not quite forgive Jana. But, really, what difference did it make, for, whether sister or mate of Thoar or another, he knew that The Red Flower of Zoram was not for him. She had made that definitely clear in her attitude toward him, which had convinced him even more definitely than had her bitter words.

The reunited officers of the expedition had much to discuss and many reminiscences to narrate as the O-220 followed above the slowly moving fleet. It was a happy reunion, clouded only by the absence of Von Horst.

As the dirigible moved slowly above the waters of the Korsar Az, Zuppner dropped occasionally to within speaking distance of Ja of Anoroc, and when the distant coast of Korsar was sighted a sling was lowered and Ja was taken aboard the O-220, where plans for the rescue of David were discussed, and when they were perfected Ja was returned to his ship, and Lajo and the two other Korsars were taken aboard the dirigible.

The three prisoners were filled with awe and consternation as Jason and Tarzan personally conducted them throughout the giant craft. They were shown the armament, which was carefully explained to them, special stress being laid upon the destructive power of the bombs which the O-220 carried.

"One of these," said Jason to Lajo, "would blow The Cid's palace a thousand feet into the air and, as you see, we have many of them. We could destroy all of Korsar and all the Korsar ships."

While Ja's fleet was still a considerable distance off the coast, the O-220 raced ahead at full speed toward Korsar, for the plan which they had evolved was such that, if successful, David's release would be effected without the shedding of blood—a plan which was especially desirable since if it was necessary to attack Korsar either from the sea or the air, the Emperor's life would be placed in jeopardy from the bombs and cannons of his friends, as well as from a possible spirit of vengeance which might animate The Cid.

As the dirigible glided almost silently over the city of Korsar, the streets and courtyards filled with people staring upward in awe-struck wonder.

Three thousand feet above the city the ship stopped and Tarzan sent for the three Korsar prisoners.

"As you know," he said to them, "we are in a position to destroy Korsar. You have seen the great fleet coming to the rescue of the Emperor of Pellucidar. You know that every warrior manning those ships is armed with a weapon far more effective than your best; even with their knives and spears and their bows and arrows they might take Korsar without their rifles, but they have the rifles and they have better ammunition than yours and in each ship of the fleet cannons are mounted. Alone the fleet could reduce Korsar, but in addition to the fleet there is this airship. Your shots could never reach it as it sailed back and forth above Korsar, dropping bombs upon the city. Do you think, Lajo, that we can take Korsar?"

"I know it," replied the Korsar.