 The newly acquired land covered an area south of the Perai River, turning the river into the international border between the British-controlled "Province Wellesley" and Kedah.At the time, "Province Wellesley" was heavily forested and sparsely populated, with a total population of only 5,000.In exchange to this acquisition, the annual payment to the Kedah Sultan was increased to 10,000 Spanish dollars per annum.