Begun in 1922 and substantially completed in 1932, the tunnel complex consisted of east-west passage measuring 836 ft. long by 24 ft. wide 13 laterals on its north side and 11 laterals on the south side. Reinforced with concrete walls. Floor and . . . — — Map (db m63648) HM WM
Corregidor derived its name from Corregimiento or Municipal District. About 1225 the island became a stronghold for Chinese pirates until the latter were driven by the Moros. Became Spanish possession, 1570, when Spaniards arrived in . . . — — Map (db m63652) HM WM