Zambia's formal northern frontier boundary was legally signed in the Anglo-Belgian Treaty of 1894, long after the 1884 Berlin Conference. This showed that the triangle of land at the northwestern point of Eastern Rhodesia from Pweto to as far south as the Lunchinda River was under Northern Rhodesia even though the Belgian Congo had administered it for many years. Belgians administered it as a matter of local convenience under a gentleman’s agreement. Much of this administration was facilitated by the Belgium missionary work in education and health, particularly the Roman Catholic Church and Greek fishermen who wanted more fishing points to supply the reported increase in demand for fish in the emerging mine town of Elizabethville (now Lubumbashi). Later, the Belgians wanted to claim this land. Over the years, during British colonial rule, District Commissioners and Provincial Commissioners were asked to provide information on the affected areas by central government authorities in Lusaka.