I do not dismiss Champollion as a source, so absolutely not. He is definitely an authority on various ancient Egyptian matters. I dismiss hands down, when people do not cite (or rewrite) the full text, and especially, in the context in which it is made. That was exactly the case here, along with Diodorus Siculus‎ who also was talking about an “excessively ancient” time, when he made similar comments about the original population coming from Ethiopia (a time before there even was a Nile). At no point was it made clear that what Champollion and Diodorus talks about pre-dates ancient Egypt by many millennia, and point more towards an early understanding of Recent African origin of modern humans, that a knowledge of the Egyptian population anno 3000 BC. I have no problem with the writing of neither these two guys, nor an insertion in the article of their texts (both are primary sources on several subjects), but I do want the inserter to apply the proper context to their statements, - they themselves supply, and not selective quote from parts of it, that suits you. Diodorus Siculus was selective quoted several times, in the now deleted section, which I already pointed out 3 month ago.