In the first place David had not the slightest intention of teaching the Korsars how to improve their powder, thereby transforming them into a far greater menace to the peace of his empire than they could ever become while handicapped by an inferior grade of gunpowder that failed to explode quite as often as it exploded. These tours of inspection, however, which often took them considerable distances from the city of Korsar, afforded an excuse for delaying the lesson in powder making, while David and his companions sought to concoct some plan of escape that might contain at least the seed of success. Also they gave the three men a better knowledge of the surrounding country, familiarized them with the various trails and acquainted them with the manners and customs of the primitive tribes that carried on the agriculture of Korsar and all of the labor of the mines, niter beds and charcoal burning. It was not long before they had learned that all the Korsars lived in the city of Korsar and that they numbered about five hundred thousand souls, and, as all labor was performed by slaves, every male Korsar above the age of fifteen was free for military service, while those between ten and fifteen were virtually so since this included the period of their training, during which time they learned all that could be taught them of seamanship and the art of piracy and raiding. David soon came to realize that the ferocity of the Korsars, rather than their number, rendered them a menace to the peace of Pellucidar, but he was positive that with an equal number of ships and men he could overcome them and he was glad that he had taken upon himself this dangerous mission, for the longer the three reconnoitered the environs of Korsar the more convinced they became that escape was possible. The primitive savages from whom the Korsars had wrested their country and whom they had forced into virtual slavery were of such a low order of intelligence that David felt confident that they could never be successfully utilized as soldiers or fighting men by the Korsars, whom they outnumbered ten to one; their villages, according to his Korsar informant, stretching away into the vast hinterland, to the farthest extremities of which no man had ever penetrated. The natives themselves spoke of a cold country to the north, in the barren and desolate wastes of which no man could live, and of mountains and forests and plains stretching away into the east and southeast to, as they put it, “the very shores of Molop Az”—the flaming sea of Pellucidarian legend upon which the land of Pellucidar floats.