But from the few records of their ancient condition--not "before the flood" with them, but before that mighty quake which had cut them off so completely--they were aware that there were other peoples and other countries.
In geology they were quite ignorant.
As to anthropology, they had those same remnants of information about other peoples, and the knowledge of the savagery of the occupants of those dim forests below.

Nevertheless, they had inferred (marvelously keen on inference and deduction their minds were!) the existence and development of civilization in other places, much as we infer it on other planets.
When our biplane came whirring over their heads in that first scouting flight of ours, they had instantly accepted it as proof of the high development of Some Where Else, and had prepared to receive us as cautiously and eagerly as we might prepare to welcome visitors who came "by meteor" from Mars.
Of history--outside their own--they knew nothing, of course, save for their ancient traditions.
Of astronomy they had a fair working knowledge--that is a very old science; and with it, a surprising range and facility in mathematics.
Physiology they were quite familiar with.

Indeed, when it came to the simpler and more concrete sciences, wherein the subject matter was at hand and they had but to exercise their minds upon it, the results were surprising.

They had worked out a chemistry, a botany, a physics, with all the blends where a science touches an art, or merges into an industry, to such fullness of knowledge as made us feel like schoolchildren.
Also we found this out--as soon as we were free of the country, and by further study and question--that what one knew, all knew, to a very considerable extent.
I talked later with little mountain girls from the fir-dark valleys away up at their highest part, and with sunburned plains-women and agile foresters, all over the country, as well as those in the towns, and everywhere there was the same high level of intelligence.

Some knew far more than others about one thing--they were specialized, of course; but all of them knew more about everything--that is, about everything the country was acquainted with--than is the case with us.
We boast a good deal of our "high level of general intelligence" and our "compulsory public education," but in proportion to their opportunities they were far better educated than our people.
With what we told them, from what sketches and models we were able to prepare, they constructed a sort of working outline to fill in as they learned more.
A big globe was made, and our uncertain maps, helped out by those in that precious yearbook thing I had, were tentatively indicated upon it.
They sat in eager groups, masses of them who came for the purpose, and listened while Jeff roughly ran over the geologic history of the earth, and showed them their own land in relation to the others.