David McDowall Hannay, 1911 Encyclopædia Britannica, Volume 24… (1911)
“ The future admiral followed his father in his youth, and was early employed in high commands. He was a member of the military order of St Iago. In 1564 he aided in the capture of Velez de Gomera, commanded the division of galleys employed to blockade Tetuan, and to suppress the piracy carried on from that port. ”
