Why don’t I ever find anything valuable. What a find! When we renovated our house the only things we found buried were a Victorian bedstead and a cross-eyed dolly head . The spirits will be the same as when bottled, just show the difference in taste between then and now. Years ago I had some old spirits that the Army sold. It WAS different. At the end of my street, an estate agent owned a house and behind it was a long shed divided into what could have been stables, although the roof was quite low. The estate agent died, and his son lived there for a few years. One day, doing something in one of the stables, he uncovered an old bottle wrapped in an old potato sack. When he opened it, he found it was full of excellent whisky, though he could not see any brand.
When we were renovating our master bedroom, we found an empty crushed can of Pabst Blue Ribbon behind the drywall. Not quite as interesting as this story, but it explained a lot about the house. When we renovated our house many years ago we found some love letters from the second world war behind an air brick in the bedroom, we knew the family and they weren’t from her husband, must have been her lover.