From some of the last prisoners he took during the fighting at the seashore, David learned that Tanar was still alive and that the chief of the invaders had determined to take him home with him in the hope that he could learn from Tanar the secrets of our superior weapons and gunpowder, for, notwithstanding my first failures, I had, and not without some pride, finally achieved a gunpowder that would not only burn, but that would ignite with such force as to be quite satisfactory. I am now perfecting a noiseless, smokeless powder, though honesty compels me to confess that my first experiments have not been entirely what I had hoped they might be, the first batch detonated having nearly broken my ear-drums and so filled my eyes with smoke that I thought I had been blinded. When David saw the enemy ships sailing away with Tanar he was sick with grief, for Tanar always has been an especial favorite of the Emperor and his gracious Empress, Dian the Beautiful. He was like a son to them. We had no ships upon this sea and David could not follow with his army; neither, being David, could he abandon the son of his best friend to a savage enemy before he had exhausted every resource at his command in an effort toward rescue. In addition to the prisoners that had fallen into his hands David had captured one of the small boats that the enemy had used in embarking his forces, and this it was that suggested to David the mad scheme upon which he embarked. The boat was about sixteen feet long and was equipped with both oars and a sail. It was broad of beam and had every appearance of being staunch and seaworthy, though pitifully small in which to face the dangers of an unknown sea, peopled, as are all the waters of Pellucidar, with huge monsters possessing short tempers and long appetites. Standing upon the shore, gazing after the diminishing outlines of the departing ships, David reached his decision. Surrounding him were the captains and the kings of the Federated Kingdoms of Pellucidar and behind these ten thousand warriors, leaning upon their arms. To one side the sullen prisoners, heavily guarded, gazed after their departing comrades, with what sensations of hopelessness and envy one may guess. David turned toward his people. “Those departing ships have borne away Tanar, the son of Ghak, and perhaps a score more of the young men of Pellucidar. It is beyond reason to expect that the enemy ever will bring our comrades back to us, but it is easy to imagine the treatment they will receive at the hands of this savage, bloodthirsty race. “We may not abandon them while a single avenue of pursuit remains open to us. Here is that avenue.” He waved his hand across the broad ocean. “And here the means of traversing it.” He pointed to the small boat. “It would carry scarce twenty men,” cried one, who stood near the Emperor.