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. "Very well," said Tarzan. "I am going to send you with a message to The Cid. Will you tell him the truth?" "I will," replied Lajo. "The message is simple," continued Tarzan. "You may tell him that we have come to effect the release of the Emperor of Pellucidar. You may explain to him that the means that we have to enforce our demands, and then you may say to him that if he will place the Emperor upon a ship and take him out to our fleet and deliver him unharmed to Ja of Anoroc, we will return to Sari without firing a shot. Do you understand?"