While protected Defending by the Liberal fleet , the division of Lieutenant-Colonel John Schwalbach crossed Motion_directional the river and occupied Control the Serra do Pilar , in Gaia , forcing Control the Royalists to withdraw Escaping in disorder to Oliveira de Azeméis .

Meanwhile , at least 841 passengers were stranded Motion in five ports in the Bicol region , namely Matnog , Tabaco , Bulan , Cataingan and Pilar .