It may not hurt to crawl under the house and look up at the subfloors, Grandpa might have used a sign or two to repair a spot or two.
Was there ever a well? I have found several signs covering wells outside and under houses.
If I ever go under old rental property I always look on the tops of the foundations, between floor joists. I have found oil cans, ink bottles,grease cans, handy oilers, spiders, snake skins, mice, etc. etc. etc.


Veeder Root Rebuilds.....since 1987
Veeder Root Identification CD
Gas Pump Clock Repair
jkyocom@bellsouth.net