Local Histories can be full of great information. Information on what the area was like at a specific date and time. Snippets of family trees. You just never know.
My favorite trick to find family trees is to go to the Ancestry.com Card Catalog.
Once there, filter down to Stories, Memories and Histories.
Then type in a city or county name into the keyword box. This will search both titles and descriptions. Below, you see that I’ve type in rockbridge
Then I search and a see a list of possible sources.
There may be nothing, but you never know. You never know where that next clue that breaks through that brick wall will be.