Tom Harrisson and the ancient iron industry of the Sarawak River delta
Stanley J. O’Connor’s 1977 memorial tribute to Tom Harrisson reflects on the significance of Harrisson’s archaeological investigations into the ancient iron-smelting industry of the Sarawak River delta, centred on the Santubong coastal area of western Borneo. Writing after Harrisson’s death, O’Connor uses the occasion to highlight unresolved interpretive questions arising from the Santubong sites—particularly the relationship between industrial and ritual activity, the enigmatic presence of broken Chinese ceramics in slag deposits, and the identification of clay cylinders as tuyeres or crucibles. The article positions Harrisson’s work as foundational to Bornean archaeology, a discipline that had almost no systematic excavation before his interventions.
Summary
O’Connor frames Harrisson’s Santubong research as an unusual fusion of contemporary ethnography and archaeological excavation, with Harrisson simultaneously documenting Malay village life and uncovering the prehistoric past of the same locality. The Santubong sites—Jaong and Bongkissam—present a distinctive challenge to conventional categories: dense iron slag deposits coexist with sandstone boulders bearing anthropomorphic and geometric markings, and with what O’Connor and Harrisson termed a “Tantric shrine.” This mingling of the industrial and the sacred resists the secular, rational framework that modern industrial archaeology typically imposes, suggesting instead that iron smelting may have functioned as a metaphorical and spiritual practice, analogous to the ritual dimensions of kris-making and mining in the wider archipelago.
The most puzzling empirical feature of the sites, O’Connor argues, is the profligate quantity of broken Chinese stoneware sherds found mixed with smelting waste. These ceramics were highly valued objects in local ritual and trade economies, yet at Santubong they appear shattered and embedded in slag-rich soil on a scale that defies straightforward economic explanation. O’Connor speculates that their presence may point to some form of ceremony or ritual associated with the iron-working process itself, though he acknowledges the question remains open pending comparative evidence from other smelting sites in the archipelago.
A second interpretive problem concerns the clay cylinders recovered in large numbers from the iron-rich trenches. In the original two-volume report, O’Connor and Harrisson tentatively identified these as crucibles associated with an Indian “wootz” steelmaking process, but O’Connor now concedes that this was likely a mistake and that informed opinion favours their identification as tuyeres. He regrets that Harrisson, whose intimate knowledge of the region was irreplaceable, was not given the opportunity to return to the material and resolve such questions definitively.
Key Findings
- Harrisson’s 1955 excavation at Bongkissam recovered 49,393 Chinese stoneware sherds, 66,668 earthenware sherds, and 659 glass beads from a single small section of the major iron-working site (p. 5).
- The site of Jaong, on the right bank of the Sarawak River at the foot of Mt. Santubong, contains dense reefs of iron slag alongside thirty large sandstone boulders marked with anthropomorphic figures or geometric patterns (p. 4).
- The longest of the clay cylinders recovered from the iron-rich trenches measured less than six inches, with a distinct tendency toward blackening and burning at only one end (p. 6).
- Excavations at Chansen and the Lopburi Army site in Central Thailand indicate that iron manufacture was present in mainland Southeast Asia by the beginning of the first millennium B.C., dramatically revising earlier chronologies (p. 4).
- Santubong functioned as a coastal trading station and iron-smelting centre from sometime after the tenth century until its collapse in the fourteenth century (p. 2).
Conclusion
O’Connor’s definitive takeaway is that Harrisson’s Santubong work established the foundational questions for Bornean archaeology at a time when almost no systematic excavation had been conducted anywhere on the island. The sites resist easy categorisation, and the interpretive problems they raise—regarding the spiritual dimensions of metallurgy, the ritual destruction of valued ceramics, and the technical identification of smelting equipment—remain open, a loss O’Connor attributes to Harrisson’s untimely death before he could return to the material.
Context
- The article draws on the primary excavation reports published as Harrisson and O’Connor, Excavations of the Prehistoric Iron Industry in West Borneo (Cornell Data Paper 72, 1969) and Gold and Megalithic Activity in Prehistoric and Recent West Borneo (Data Paper 77, 1970), as well as the Sarawak Museum Journal series.
- Historiographically, the piece marks a transitional moment in Southeast Asian archaeology, shifting attention from bronze and ceramics toward the neglected history of iron technology, and introducing interpretive frameworks (technological metaphor, ritual economy) that would influence subsequent work on prehistoric metallurgy in the region.