Flour shipped from the Mississippi River to Havana can pass by the very entrance to the city on its way to a port in Spain, there pay a duty fixed upon articles to be reexported, transferred to a Spanish vessel and brought back almost to the point of starting, paying a second duty, and still leave a profit over what would be received by direct shipment. All that is produced in Cuba could be produced in Santo Domingo. Being a part of the United States, commerce between the island and mainland would be free. There would be no export duties on her shipments nor import duties on those coming here.