Pasig River. Article #19. Vol. 9, pg 182.
The Pasig River runs from Laguna de Bay, the largest lake in the Philippines, to Manila Bay, bisecting Manila. The river isn’t much to write home about, described as shallow and sluggish, although (happily) navigable by small crafts.
Here’s a fun fact. In the dry season, when the water level in Laguna de Bay is lower, Pasig River can actually flow backwards when the tide is rising. That’s going to be a little irritating for those guys navigating small crafts.
“Pasig River.” Encyclopedia Britannica. 15th ed. 2010. Vol 9, pg 182.