“36. THE FOURTH RACE DEVELOPED SPEECH.
The Commentaries explain that the First Race – the ethereal or astral Sons of Yoga, also called “Self-born” – was, in our sense, speechless, as it was devoid of mind on our plane.
The Second Race had a “Sound-language”, to wit, chant-like sounds composed of vowels alone.
The Third Race developed in the beginning a kind of language which was only a slight improvement on the various sounds in Nature, on the cry of gigantic insects and of the first animals, which, however, were hardly nascent in the day of the “Sweat-born” (the early Third Race).
In its second half, when the “Sweat-born” gave birth to the “Egg-born” (the middle Third Race), then only was speech developed. But even then it was still no better than a tentative effort.
Speech then developed, according to occult teaching, in the following order:
I. Monosyllabic speech; that of the first approximately fully developed human beings at the close of the Third Root-Race, the “golden-colored”, yellow complexioned men, after their separation into sexes, and the full awakening of their minds.
Before that, they communicated through what would now be called “thought-transference.”
II. These linguistic characteristics developed into the agglutinative languages.
The latter were spoken by some Atlantean races, while other parent stocks of the Fourth Race preserved the mother-language.
III. The inflectional speech – the root of the Sanskrit – was the first language (now the mystery tongue of the Initiates, of the Fifth Race.)
37. THE ONE (ANDROGYNE) BECAME TWO; ALSO ALL THE LIVING AND CREEPING THINGS THAT WERE STILL ONE, GIANT FISH, BIRDS, AND SERPENTS WITH SHELL-HEADS.
This relates evidently to the so-called age of the amphibious reptiles, during which age science maintains that no man existed!
But what could the ancients know of antediluvian prehistoric animals and monsters!”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 