Arthur’s hoard?
More likely it was buried to escape tax collector/seizures and/or bandits/burglars.
It was quite the agrarian lifestyle, and I would speculate that most of the hovels would be vacant while the family was out working the fields, tending the live stock, etc.
And the owners probably were killed in accidents or by robbers, or dropped dead of one natural thing or another.
His sister hoard half of it.