Thank you for those good pointers. I hope others use them.
I am not please with Ancestry's search engine nor with some of their transcribers. If I have seen "John Brown" in a certain census and want to look it up again, I put in "John Brown, the exact year and the exact city, county and state and mark them as exact, the search engine cannot find what I want and then makes me wade through everything from other cities until I get to the one I want.
I have searched the 1900 census in Alaska where many were listed as "MX" for "mixed race" of Natives. Ancestry has labeled these as Mexicans even though they all have Russian and Scandinavian names.