Presently the ground dipped down into a little hollow ringed with trees. It was a bit darker here than it had been on the higher level, and as he went down the slope of its side he saw that among the underbrush which filled it were cunningly hidden huts twined together out of the living bushes. Obviously the hollow was a tiny village where the tree-folk dwelt. He was surer of this when they began to grow bolder as he went down into the dimness of the place. The whispers shrilled a little, and the boldest among his watchers ran almost at his elbow, twittering their queer, broken speech in hushed syllables whose familiarity still bothered him with its haunting echo of words he knew. When he had reached the center of the hollow he became aware that the little folk had spread out in a ring to surround him. Wherever he looked their small, anxious faces and staring eyes confronted him. He grinned to himself and came to a halt, waiting gravely. None of them seemed quite brave enough to constitute himself spokesman, but among several a hurried whispering broke out in which he caught the words "Thag" and "danger" and "beware." He recognized the meaning of these words without placing in his mind their origins in some tongue he knew. He knit his sun-bleached brows and concentrated harder, striving to wrest from that curious, murmuring whisper some hint of its original root. He had a smattering of more tongues than he could have counted offhand, and it was hard to place these scattered words among any one speech. But the word "Thag" had a sound like that of the very ancient dryland tongue, which upon Mars is considered at once the oldest and the most uncouth of all the planet's languages. And with that clue to guide him he presently began to catch other syllables which were remotely like syllables from the dryland speech. They were almost unrecognizable, far, far more ancient than the very oldest versions of the tongue he had ever heard repeated, almost primitive in their crudity and simplicity. And for a moment the sheerest awe came over him, as he realized the significance of what he listened to. * * * * * The dryland race today is a handful of semi-brutes, degenerate from the ages of past time when they were a mighty people at the apex of an almost forgotten glory. That day is millions of years gone now, too far in the past to have record save in the vaguest folklore. Yet here was a people who spoke the rudiments of that race's tongue as it must have been spoken in the race's dim beginnings, perhaps a million years earlier even than that immemorial time of their triumph. The reeling of millenniums set Smith's mind awhirl with the effort at compassing their span.