master or factor of each and every foreign ship or vessel,
clearing out for any of the coasts or kingdoms of Africa, or
suspected to be intended for the slave-trade, and the
suspicion being declared to the officer of the customs, by
any citizen, on oath or affirmation, and such information
being to the satisfaction of the said officer, shall first
give bond with sufficient sureties, to the Treasurer of the
United States, that none of the natives of Africa, or any
other foreign country or place, shall be taken on board the
said ship or vessel, to be transported, or sold as slaves,
in any other foreign port or place whatever, within nine
months thereafter.