have generally dismissed this claim and now generally agree that Nuno Tristão only reached as far as the Sine-Saloum delta, still in Senegal, just a few kilometres south of Cape of Masts (Cape Naze) or, at their most generous, the Gambia River. Exactly where has been subject to debate. In his careful investigation, historian Teixeira da Mota concluded that Nuno Tristão first prodded up the Saloum River (Rio de Barbacins, ) then sent his launch up the Diombos River (Rio de Lago, ), the south bank of which was controlled by the Mandinka king known as Niumimansa, of the Niumi Bato. It was these Mandinka (or Mandikized) warriors that ambushed and killed Nuno Tristão. Other scholars attribute the killing of the Portuguese slave raider and his party to the Serer people of Senegambia. This is the general consensus. The death of Nuno Tristão, Henry's favorite captain, was the beginning of the end of this wave of Henry's expeditions. Another set of ships would still go out the next year, but would also take significant casualties, and as a result, Portuguese expeditions were temporarily suspended. Henry the Navigator did not dispatch another expedition to the West African coast again until a decade later (Cadamosto in 1455). See also History of Portugal (1415–1542) Portuguese Empire Notes References João de Barros (1552–59) Décadas da Ásia: Dos feitos, que os Portuguezes fizeram no descubrimento, e conquista, dos mares, e terras do Oriente. Vol. 1 (Dec I, Lib.1-5) Gomes Eanes de Zurara (1453) Crónica dos feitos notáveis que se passaram na Conquista da Guiné por mandado do Infante D. Henrique or Chronica do descobrimento e conquista da Guiné. [Trans. 1896–99 by C.R. Beazley and E. Prestage, The Chronicle of the Discovery and Conquest of Guinea, London: Halykut] Barreto, João (1938) História da Guiné, 1418–1918. Lisbon. Castlereagh, Duncan. Encyclopedia of Discovery and Exploration - The Great Age of Exploration. Aldus Books London, 1971. Castilho, A.M. de (1866) Descripção e roteiro da costa occidental de Africa, desde o cabo de Espartel até o das Agulhas, Lisbon: Impresa Nacional, 2 vols. Cortesão, Armando (1931) "Subsídios para a história do Descobrimento de Cabo Verde e Guiné", Boletim da Agencia Geral das Colonias, No. 75. As reprinted in 1975, Esparsos, vol. 1, Coimbra Leite, Duarte (1941) Acerca da «Crónica dos Feitos de Guinee». Lisbon: Bertrand Magalhães Godinho, Vitorino de (1945) Documentos sôbre a Espansão Portuguesa, 2 vols, Lisbon: Gleba. Peres,