Just before dawn we dropped to one of the numerous small islands that dot the Great Toonolian Marshes and nosing the ship between the boles of great trees we came to rest upon the surface of the ground, half buried in the lush and gorgeous jungle grasses, well hidden from the sight of possible pursuers. Here Hovan Du found fruits and nuts for us which the simian section of his brain pronounced safe for human consumption, and instinct led him to a nearby spring from which there bubbled delicious water. We four were half famished and much fatigued, so that the food and water were most welcome to us; nor did Xaxa and Sag Or refuse them. Having eaten, three of us lay down upon the ship’s deck to sleep, after securely chaining our prisoners, while the fourth stood watch. In this way, taking turns, we slept away most of the day and when night fell, rested and refreshed, we were ready to resume our flight. Making a wide detour to the south we avoided Toonol and about two hours before dawn we sighted the high Tower of Thavas. I think we were all keyed up to the highest pitch of excitement, for there was not one aboard that flier but whose whole life would be seriously affected by the success or failure of our venture. As a first precaution we secured the hands of Xaxa and Sag Or behind their backs and placed gags in their mouths, lest they succeed in giving warning of our approach. Cluros had long since set and Thuria was streaming towards the horizon as we stopped our motor and drifted without lights a mile or two south of the tower while we waited impatiently for Thuria to leave the heavens to darkness and the world to us. To the north-west the lights of Toonol shone plainly against the dark background of the windows of the great laboratory of Ras Thavas, but the tower itself was dark from plinth to pinnacle. And now the nearer moon dropped plummetlike beneath the horizon and left the scene to darkness and to us. Dar Tarus started the motor, the wonderful, silent motor of Barsoom, and we moved slowly, close to the ground, towards Ras Thavas’ island, with no sound other than the gentle whirring of our propeller; nor could that have been heard scarce a hundred feet so slowly was it turning. Close off the island we came to a stop behind a cluster of giant trees and Hovan Du, going into the bow, uttered a few low growls. Then we stood waiting in silence, listening. There was a rustling in the dense undergrowth upon the shore. Again Hovan Du voiced his low, grim call and this time there came an answer from the black shadows. Hovan Du spoke in the language of the great apes and the invisible creature replied. For five minutes, during which time we were aware from the different voices that others had joined in the conversation from the shore, the apes conversed, and then Hovan Du turned to me.