Kingsley Garland Jayne and Edgar Prestage, 1911 Encyclopædia Britannica (1911)
“ Lisbon, Elvas and Angra in the Azores, were considered first-class fortresses, but only Lisbon had modern defences. The Portuguese navy in 1910 consisted of 1 armoured vessel, 5 protected cruisers, 2 third-class cruisers, 19 gunboats, 1 torpedo gunboat, 4 torpedo boats, 16 river gunboats, 4 transports and 3 training ships. Twelve other vessels, including 2 submarines, were under construction. The whole fleet was manned by about 5000 men. ”
