So I have seen the lake Timah Tasoh. I was continuing my journey to Kangar when I saw what seems like a nice place to rest and refresh.
What is interesting is here one could see the 'source'.
Because this is where a river of Perlis is contained with a dam, must be a main river. The resulting lake is what becomes the vast freshwater body called Timah Tasoh. Using Google Earth I followed the flow of the river from the lake on downriver and found out it flows into the open sea or rather, the Straits of Melaka at Kuala Perlis. That means this the river Perlis or Sungai (river of) Perlis. Ah. That also means I could add this article later to the collection "Fascination for rivers". :]