“ Where there are no islands in the boundary rivers the location of the line between the two states is on the water midway between the main banks of the river when water is at ordinary stage.
Second. Where there are islands, the line is midway between the island bank and the South Carolina shore when the water is at ordinary stage.
Third. That all islands formed by nature in the Chattooga river are reserved to Georgia as completely as are those in the Savannah and Tugaloo rivers. ”