Hi Joni, There are a couple of obituary volunteers in Fresno Co. There's one at freepages.genealogy.rootsweb.ancestry.com/~obitl/volca.html Scroll down to Fresno
There's another one at geneasearch.com/lookups/ca.htm Look through the listings for Fresno, California. Unfortunately they're not in alphabetical order.
DO choose ONE at a time.
I also found the locke Family Tree, trees.ancestry.com/tree/21430363/person/18408393121 which contains your Nichols family. Most larger libraries provide free access to Ancestry.It doesn't show a wife for John but thought you might want to contact the owner. Successful Searching!