Once inside the bay and anchored, the next visitors were typically members of the Revenue Cutter Service (predecessor of U.S. Coast Guard). Founded by Alexander Hamilton on 4 August 1790, the Revenue Cutter Service is the United States' oldest continuous seagoing service and enforced the tariff laws and tariff collection via customs duties (tariffs or ad valorem taxes) on foreign import goods. In the 1800s about 85–95% of the money collected and used by the Federal Government was from tariff collections. Customs collections were set up by late 1847 in San Francisco—the designated port of entry for most of California. Soon after the revenuers had arrived, the ships were often visited by merchants looking for first choice on the arriving goods.