I posted this to a site for Harlan County and one of the members gave this suggestions. I believe this could be one to run with. In the 1850 census for Johnson County, there is Jacob Salyer (Salier) born 1805 and Newcarious Litteral Salyer. It is more like these are Clarissa's parents than Zachariah and Mary. I'm not sure, but I believe Newcarious also went by Mary. If they were in Harlan County earlier in the census, it could very well be that these are her parents. I will be checking, but if you find out anything let me know.