Complex sentence: The practice was certainly well established between tribes in Africa trading with India in the 15th Century since it was recorded by Prince Henry'the Navigator' of Portugal when he occupied Ceuta in 1415.
Split into simpler sentences: The practice was certainly well established between tribes in Africa in their trade with India. Cosmas Indicopleustes describes this practiced in Azania, where officials from Axum bartered for gold with beef 1 Prince Henry the Navigator of Portugal recorded this practice when he occupied Ceuta in 1415.