Collen Truelsen (translator of the Spanish book "Los Bubis de Fernando Poo") said:
"Modern thought on Bantu origin and expansion places the cradle of the Bantu languages in Nigeria’s Benue Valley. According to Jan Vansima, in Paths in the Rainforest* (University of Wisconsin Press, 1990): “In that general area, the Bantu family split into two branches: eastern and western Bantu, a split dated by glottochronology to c. 3000 BC. Western Bantu evolved east of the Cross River in western Cameroon, both on the then-forested Bamileke Plateau and on the lowlands near the ocean.” Author John Reader, in his book Africa: A Biography of the Continent (Alfred A. Knopf, 1998), also puts Bantu dispersion from their cradle-land at around 5000 years ago. The Bubis still are believed to have been among the first Bantu to migrate, and probably first arrived on Bioko sometime between 2000 and 3000 BC. Vansima notes: “Among the early splits, some were caused by the isolation of small groups moving out of reach. That seems to be the case for the Bioko and the Myene-Tsogo group, who moved by sea. ... Archaeological evidence attests to the early phases of settlement on Bioko. The earliest sites lie on the northern coast. They reveal a Neolithic occupation without ceramics, which has not been dated. From the seventh century AD on, pottery appears.”* A second wave of migration from the African coast to Bioko Island accounts for much-later settlements. Vansima writes: “Most traditions tell of a Great Migration comprising four waves of immigrants. ... (Evidence) suggests that the immigrants conquered the earlier Bubi settlers. Nevertheless, the archaeological and linguistic evidence makes it clear that, conquerors or not, the immigrants adopted the language and the material culture of the aboriginal population.* ... The archaeological evidence in hand suggests that the Great Migration ended in the fourteenth century.”