On the peninsula that guards the mouth of the Sarawak river lie the best-excavated trade and iron sites of Borneo for this age: smelting slag at Sungai Jaong, ceramic-rich settlement and burial grounds at Bukit Maras and Tanjong Kubor, with Tang and Song stoneware in quantity (the Sarawak Museum digs from the 1950s onward, Tom Harrisson and later teams; the campaign board gives the span as the tenth to the thirteenth century and we could not recheck it).
It is a trading town without a name in any record. The people who lived there, who ran the furnaces, and whether a chief or a council ruled it are not known; the brief's rule is to treat it as a site, not a state. Its wealth was iron, gold from the Bau hills upriver (the campaign board), and forest goods brought from the Sarawak and Rajang interior, sold against Chinese stoneware.
Who he is
- Title
- Chief of the Santubong trading and iron-working settlements (title not known)
- Since
- not pinned
- Born
- not known
- Family
- not known
- Confidence
- low
No text names Santubong, its people or any ruler. The campaign board and the brief treat it as a site, not a state.
What it holds
- The smelting works at Sungai Jaong and the iron they made
- The river mouth and the landing on the Santubong peninsula
- The exchange of Bau gold and forest goods for stoneware
- The burial ground at Tanjong Kubor
Allies and rivals
Trading partners are Chinese junk captains and Malay and Javanese shipmasters; the upriver Bidayuh and Melanau-side peoples supply gold and produce. No source names a rival.
How things stand that morning
If the site's working life runs from the tenth to the thirteenth century, Santubong is in its last working generations in 1200, or already shrinking; the decline date is not pinned and no cause is known.
Wealth
Iron, gold, camphor and gaharu, stoneware. No figures.
Threats
- Exhaustion of charcoal and ore near the furnaces
- The shift of the Chinese trade to other ports
- Sea raiders
Places of note
- Sungai Jaong iron works: Smelting site on the peninsula (position approximate).
- Bukit Maras: Hill site with finds (position approximate).
- Tanjong Kubor: Burial and settlement ground with imported ceramics; excavated, not recorded in any text.
- Bau gold hills: Alluvial gold in the limestone country behind the Sarawak river; the gold that made Santubong rich, by the campaign board's reading.
Where the sources disagree
- The campaign board entry id santubong-delta is rated 'secure' for the site; that is right for the site and says nothing about who ruled it.
- The campaign board entry id tanjung-kubor (1.7, 110.382) and bau-gold-hills are folded in here as points.
- A former Sarawak Museum curator's claim of a 'Santubong Kingdom' from 300 BCE to 1647 CE is quoted, and not endorsed, on the Wikipedia page 'Mount Santubong'; no text or dated find we could reach supports a state, and the brief says site, not state. The Hindu-era remains and the graves have their own record (Santubong remains).
Evidence: Good excavated evidence (slag heaps, ceramic scatters), no text. The dating span is the campaign board's and recalled from the Sarawak Museum work, not re-read.
"The campaign board" is OMNIA's working map. These notes record where its earlier claims were checked against the sources.
On the map: A site, drawn as a small seeded block; no boundary is known.
Sources and studies
- Background knowledge of Southeast Asian history (Wolters; Hall; Bellwood; Scott; Junker; Reid), recalled and not re-read in this pass
- The OMNIA board (September 2026) note for this place: a lead only, not a source
- The isa regional brief (ISA_BRIEF.md) and assignment ise.txt
- Wikipedia, 'Mount Santubong' (read in this pass): signs of Hindu occupation at the foot of the mountain, investigated by the Sarawak Museum; a former museum curator's claim of a Santubong kingdom from 300 BCE to 1647 CE, which the page does not endorse
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.