Letter from the Secretary of the Treasury, transmitting, in obedience to a resolution of the Senate of 4th May, 1820, a statement of the money which has been annually appropriated, and paid, since the year seventeen hundred and seventy-five, for surveying the seacoast, bays, inlets, harbors, and shoals ; and for erecting, and keeping in repair, light-houses, beacons, and buoys, and for the purchase of ground for light-houses ; distinguishing the places where they have been erected, and the sums annually expended for keeping and supplying the same

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