Note the crack around the edge of the surface of the stone.
The term "engraved in stone" is used to indicate permanency. Unfortunately
this is often not the case. This stone, erected in 1867 is already
showing severe signs of decay, and the whole surface, with the engraving,
has been damaged by frost and is about to become detached entirely.
There is already a hollow space behind it. Sadly, it may not
last more than a few more winters.