The day following the coming of Vas Kor to the palace of the Prince of Helium great excitement reigned throughout the twin cities, reaching its climax in the palace of Carthoris. Word had come of the abduction of Thuvia of Ptarth from her father's court, and with it the veiled hint that the Prince of Helium might be suspected of considerable knowledge of the act and the whereabouts of the princess.

In the council chamber of John Carter, Warlord of Mars, was Tardos Mors, Jeddak of Helium; Mors Kajak, his son, Jed of Lesser Helium; Carthoris, and a score of the great nobles of the empire.

"There must be no war between Ptarth and Helium, my son," said John Carter. "That you are innocent of the charge that has been placed against you by insinuation, we well know; but Thuvan Dihn must know it well, too.

"There is but one who may convince him, and that one be you. You must hasten at once to the court of Ptarth, and by your presence there as well as by your words assure him that his suspicions are groundless. Bear with you the authority of the Warlord of Barsoom, and of the Jeddak of Helium to offer every resource of the allied powers to assist Thuvan Dihn to recover his daughter and punish her abductors, whomsoever they may be.

"Go! I know that I do not need to urge upon you the necessity for haste."

Carthoris left the council chamber, and hastened to his palace.

Here slaves were busy in a moment setting things to rights for the departure of their master. Several worked about the swift flier that would bear the Prince of Helium rapidly toward Ptarth.

At last all was done. But two armed slaves remained on guard. The setting sun hung low above the horizon. In a moment darkness would envelop all.

One of the guardsmen, a giant of a fellow across whose right cheek there ran a thin scar from temple to mouth, approached his companion. His gaze was directed beyond and above his comrade. When he had come quite close he spoke.

"What strange craft is that?" he asked.