As early as 1839, American interest was generated for the Pago Pago area when Commander Charles Wilkes, head of the United States Exploring Expedition, surveyed Pago Pago Harbor and the island. Rumors of possible annexation by Britain or Germany were taken seriously by the U.S., and the U.S. Secretary of State Hamilton Fish sent Colonel Albert Steinberger to negotiate with Samoan chiefs on behalf of American interests. American interest in Pago Pago was also a result of Tutuila's central position in one of the world's richest whaling grounds. 