Pitt's plan for an expedition to capture Belle Île was put into force in April 1761 and it was captured after a siege. This provided yet a further blow to French prestige, as it was the first part of Metropolitan France to be occupied. Pitt now expected France to offer terms, although he was prepared for a longer war if necessary. Envoys were exchanged, but neither side could reach an agreement. Pitt's refusal to grant the French a share in Newfoundland proved the biggest obstacle to peace, as Pitt declared he would rather lose the use of his right arm than give the French a share there and later said he would rather give up the Tower of London than Newfoundland. Newfoundland was at the time seen as possessing huge economic and strategic value because of the extensive fishing industry there.