tombstone

True, there's no harm in crying for one's husband, and the tombstone, though plain, was a solid piece of work, and on summer's days when the widow brought her boys to stand there one felt kindly towards her.

If you attempt to restore a backup that is older than the tombstone lifetime, it may introduce objects that were deleted […]

This actually results in a crash dump, which is written to the log and to a tombstone file.