Sentence:  "The Foreigner by his Intercourse with an <WSD>Autocthon</WSD> has an <WSD>Autocthon</WSD> Progeny." Wherever a type is found in the population of a country, there it is still found in spite of innumerable crossings; ... 
Meaning of the word marked with <WSD> tags:  The earliest inhabitant of an area; an aborigine.