Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic City of Vigan' has mentioned 'River' in the following places:
Occurrence Sentence Text Source
The most commonly known source of the city's name is from the Biga'a plant, which once grew abundantly along the banks of the Mestizo River, from which captain Juan de Salcedo derived the city's name (after a misunderstanding with the locals, thinking he was asking the name of the plants).
Due to silting of the Mestizo River, Vigan City is no longer separated from the mainland, therefore no longer an island.
Vigan was a coastal trading post long before the Spaniards arrived; Chinese traders sailing from the West Philippine Sea came to Isla de Vigan (Island of Vigan) via the Mestizo River that surrounded it.
III, p.xc2xa0276, Blair and Robertson) two letters from Governor-General Guido de Lavezaris to King Philip II of Spain mention: "It seemed best to send Captain Juan de Salcedo with 70 or 80 soldiers to explore the coast of Los Ilocanos on the shores of the river called Bigan."
The Govantes River cuts the current Vigan plain from North to South.
The most vital of these rivers is said to be the Mestizo River which was used by the small vessels to transport goods and people.
The northern part of the plain is drained by minor rivers namely: Bantaoay, Santo Tomas, and Nauman rivers, while the Abra River is the main drainage network of the southern portion of the plain.
The Abra River meanders into the hinterland but exhibits a braided pattern across the plain.
Vigan is being drained by the Vigan River and Bantay River, respectively, on the north and on the south by Mestizo River whose water discharge comes from the Bantaoay head waters.
The dominant topographic feature in the eastern margin of the town is the Vigan Gap Hill where the continuously shifting Vigan River cuts its way.
An important trading post before the colonial era, Vigan is located at the river delta of Abra River, along the northwestern coastline of the main island of Luzon, in the Province of Ilocos Sur, Philippine Archipelago.