There was another connotation in the speaking of that tongue by these timid bush-dwellers, too. It must mean that the forgotten wizard king, Illar, had peopled his sinister, twilight land with the ancestors of today's dryland dwellers. If they shared the same tongue they must share the same lineage. And humanity's remorseless adaptability had done the rest. It had been no kinder here than in the outside world, where the ancient plains-men who had roamed Mars' green prairies had dwindled with their dying plains, degenerating at last into a shrunken, leather-skinned bestiality. For here that same race root had declined into these tiny, slinking creatures with their dusky skins and great, staring eyes and their voices that never rose above a whisper. What tragedies must lie behind that gradual degeneration! All about him the whispers still ran. He was beginning to suspect that through countless ages of hiding and murmuring those voices must have lost the ability to speak aloud. And he wondered with a little inward chill what terror it was which had transformed a free and fearless people into these tiny wild things whispering in the underbrush. The little anxious voices had shrilled into vehemence now, all of them chattering together in their queer, soft, rustling whispers. Looking back later upon that timeless space he had passed in the hollow, Smith remembered it as some curious nightmare--dimness and tapestried blurring, and a hush like death over the whole twilight land, and the timid voices whispering, whispering, eloquent with terror and warning. He groped back among his memories and brought forth a phrase or two remembered from long ago, an archaic rendering of the immemorial tongue they spoke. It was the simplest version he could remember of the complex speech now used, but he knew that to them it must sound fantastically strange. Instinctively he whispered as he spoke it, feeling like an actor in a play as he mouthed the ancient idiom, "I--I cannot understand. Speak--more slowly----" A torrent of words greeted this rendering of their tongue. Then there was a great deal of hushing and hissing, and presently two or three between them began laboriously to recite an involved speech, one syllable at a time. Always two or more shared the task. Never in his converse with them did he address anyone directly. Ages of terror had bred all directness out of them. "Thag," they said. "Thag, the terrible--Thag, the omnipotent--Thag, the unescapable. Beware of Thag." For a moment Smith stood quiet, grinning down at them despite himself. There must not be too much of intelligence left among this branch of the race, either, for surely such a warning was superfluous. Yet they had mastered their agonies of timidity to give it. All virtue could not yet have been bred out of them, then. They still had kindness and a sort of desperate courage rooted deep in fear.