John Carter – Disney’s Behind the Scenes Interviews & real Edgar Rice Burroughs text
And now as my eyes fell upon him, I saw that he was no Thark, for his ornaments and metal were not of that horde. He was a huge fellow, terribly scarred about the face and chest, and with one broken tusk and a missing ear. Strapped on either breast were human skulls and depending from these a number of dried human hands.
His reference to the great games of which I had heard so much while among the Tharks convinced me that I had but jumped from purgatory into gehenna.

"Finally all the hatred and maniacal loathing for these awful creatures who had placed me in this horrible place was centered by my tottering reason upon this single emissary who represented to me the entire horde of Warhoons."
After a few more words with the female, during which she assured him that I was now fully fit to travel, the jed ordered that we mount and ride after the main column…
- The Barsoom series: Princess of Mars – Chapter 18
“Chained in Warhoon“