Castile claimed exclusive sovereignty over the Guinea coast by 1453

Evidence

John William Blake in his documentary history of Europeans in West Africa, 1450–1460, vol. 1 (Kraus, Nendeln, 1967), asserts that the records he has gathered “show that between 1453 and 1480 Andalusian seamen and traders sent many ships to the West African coast, and that the government of Castile claimed exclusive possession of Guinea” (p. 186, see also p. 189). — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 1824