[1] Title; Conquerors, Author: Roger Crowley, Publisher: Random House; 1st edition, Page: 157-160 year: 2015
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Portuguese historian Armando Cortesão asserts that Duarte Pacheco was the son of Gonçalo Pacheco, a treasurer of the Casa de Ceuta, who famously outfitted the slave-raiding fleet of Dinis Eanes de Grã that devastated the Bay of Arguin in 1444/45. See Armando Cortesão (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.p.10
Diffie, Bailey Wallys; Boyd C. Shafer; George Davison Winius Foundations of the Portuguese empire, 1415-1580 University of Minnesota Press, Nov 1977 ISBN978-0-8166-0782-2 p. 452 [2]