1.   Indeed, it is illegal today to possess a metal detector on the islands, so rich is the trove of still undiscovered treasures.

2.   Sometimes they venture into flea markets or rummage sales in the hope of finding an undiscovered treasure.

3.   Then the collection was searched for undiscovered treasures.

4.   Egypt, for example, has few resources to police its museums, let alone the vast areas in which undiscovered treasures are still buried and where looters work.