evidence: Description [edit]The border starts in the north at the tripoint with Niger in the Niger River and then proceeds in a roughly south-to-southwesterly direction overland, before reaching the Okpara River just east of Waria. The border then proceeds to the south, utilising the Okpara for circa 100 miles, various small streams, and several overland sections, before terminating at the Bight of Benin.[2] [...] A rough delimitation between the two territories as far north as the 9th parallel had been negotiated on 10 August 1889; this was further clarified in more detail via an agreement of 12 October 1896.[3][2] An Anglo-French treaty of 14 June 1898 confirmed this border, and extended it northwards up to the river Niger.[3][2] This border was confirmed by a treaty of 19 October 1906, with some minor changes made in 1912 following on-the-ground demarcation which were later finalised officially via an exchange of notes in 1914.[2][3] The section between the Atlantic and the Okpara river was marked on the ground by 142 concrete beacons, the boundary being formed by a straight line between them.[2]