One of the first brick walls a young genealogist learns is 1890 US Census. This census was destroyed by fire in the 1920’s. As such, there are large gaps in information. When I post other biographies of key family members, I will not address this missing census. When possible, other primary information has been gathered to complete the void left by this census. However, in many cases it is a large enough void where families are all but lost.
If you want to learn more about the lost census, I have attached a link.