New flag flies over Isles few ever see. Turtle treasure. Some 2 1/2 million turtle eggs, valued at ?250, are exported each year from the Turtle Islands to Borneo, Singapore, and Hong Kong. The greater part of the revenue of the islands, which amounts to barely ?75, accrues from the Turtle egg concession, which is for up for auction each year. The picture shows how the islanders dig for the precious eggs