Hi,
Your John P. Chrisman is listed in the 1900 Census, California, Contra Costa Co., Superosis (?) Dist #2, Volume 2, ED 410, Sheet 3, Line 35.
His birth info is listed as Oct 1825, native of Virginia.
I am looking for a Josiah, a Jesse H. and a John Chrisman (all from PA). After I found John P's birth place, I did not pay attention to the rest of the census info - but at least, I wrote down the reference numbers. If you go to a LDS Family History Center or good genealogy library, you should be able to get the census. In the meantime, you know that you have a connection to Virginia. Good Luck.