"What enemies can they have around here?" I asked. "Kandus told me that even the green men are afraid of them.

"There is another city in the forest inhabited by an offshoot of this tribe," explained Ptor Fak; "it is called Onvak, and its people also possess the secret of invisibility. Occasionally the Onvaks come and attack Invak, or lie in wait for the Invak hunting parties when they go out into the forest."

"I should think it might be rather difficult to fight a battle in which one could see neither foe nor friend," I suggested.

"Yes; I understand that there's never very much damage done, though occasionally they capture a prisoner. The last battle they had the Invaks took two prisoners, and when they got them into the city they discovered that they were both their own men. The never know how many of their own people they kill; they just go slashing about them with their swords, and Issus help whoever gets in the way."

Just as Ptor Fak finished speaking I felt hands doing something to the shackles about my ankles and presently they were unlocked and removed.

"Come, slave," said the voice. Then someone took me by the arm and led me toward the entrance to one of the streets.

The moment we entered I could see a warrior at my side and there were others in front and behind me. They conducted me along this street through two other courtyards in which, of course, they immediately became invisible and I seemed to be walking alone with only the pressure of a hand upon my arm to indicate that I was not. They took me to a large room in which a number of people were standing about in front of and on either side of a desk at which there sat a scowling, fierce visaged man.

I was led up to the desk and halted there and the man behind it surveyed me in silence for several seconds. His harness was extremely elaborate, the leather being beautifully carved and studded with precious stones. The hilt of his sword which I could just see above the desk was apparently of gold and it too was studded with those rare and beautiful gems of Barsoom which defy description in words of earthly origin. Encircling his brow was a diadem of carved leather upon the front of which the Barsoomian hieroglyphs which spelled jeddak were emblazoned in precious stones. So this was Ptantus, jeddak of Invak. I felt that Llana and I could not have fallen into much worse hands.

Chapter 5