I just went and looked again at the marriage recording for David H and Mary S and Jefferson County is what is written as to the county of their marriage.
I just also looked at what David wrote in his military records:
From discharge to 1866 in Iowa, 1866-70 Kansas, then came to California where he has lived since.
He also stated that he was born 28th of July, 1836 at Green Co. Ohio.
When I mentioned Montgomery County, that was a slip of the brain. Not even sure there is one but do know that Jefferson and Montgomery counties were mixed up by (more than likely) my thinking as I was writing.
Information has come in so fast that my diary is not very big, that is why I need to take time and go through all the messages and record each of them so it's easier to refer back to them.