Edgar Rice Burroughs,
The Land That Time Forgot — Chapter IX
(1918)
“ Below these in the scale of evolution came the Bo-lu, or club-men, and then the Alus, who had no weapons and no language. In that word I recognized what to me seemed the most remarkable discovery I had made upon Caprona, for unless it were mere coincidence, I had come upon a word that had been handed down from the beginning of spoken language upon earth, been handed down for millions of years, perhaps, with little change. It was the sole remaining thread of the ancient woof of a dawning culture which had been woven when Caprona was a fiery mount upon a great land-mass teeming with life. ”
