Google test
Go to Google Books, type in “manskin indians” and carefully look at the hits.
You will see that almost all of the hits reference the fact that “Manskin” is a misspelling of “Manakin” or “Monocan” and that it was erroniously located or it was a misprint. Try it
http://books.google.com/books?q=manskin+indians
The most telling is that the Google search engine has seen this the word “Manskin” coorelated with “Manakin” so many times that it even asks “Did you mean Manakin Indians”
So obvious that even a bot has figured it out!