Simanggang in 1966, from the radio tower

Looking down toward the bazaar from Fort Alice (base of the radio tower)

Bandar Sri Aman, ca. 2002... and barely recognizable (main shophouse block is in both the top and bottom pictures, but most of the rest is new construction. Fort Alice is barely visible in the clump of trees next to the river)

Another comparison: Sibu (Sarawak's second-largest city) in 1966 and at present:

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The Batang Lupar is the location for Somerset Maugham's story "The Yellow Streak", based in his own near-fatal experience with the river's tidal bore. Here's a page (in Malay) with pictures of the benak in Batang Lupar

And here's a crocodile captured in Batang Lupar waters (from http://www.residenbsriaman.sarawak.gov.my/page37.html)

...and see a list of people killed by crocodiles, 1941-1999, with locations (most are tributaries of the main river)