Evidence of Absence? The Rarity of Gold in Durotrigan Iron Age Coinage
Generations of archaeologists have done well to remember the truism that ‘absence of evidence is not evidence of absence’. About fifteen years ago I presented Barry Cunliffe with what I regarded as some rather distressingly blank distribution maps of various Iron Age artefacts in northwest France. Far from agreeing with my pessimistic view of the possibility of saying anything very meaningful about such paltry evidence, Barry reminded me of the ‘absence of evidence’ maxim, and encouraged me to think more deeply about the apparent gaps, and to question my assumptions about the usefulness or otherwise of the data—in short, to look more positively at the opportunities for investigating such seemingly negative evidence. It is perhaps a little ironic, then, that in this tribute to Barry’s unrivalled influence on Iron Age studies, I would like to present an example where I am nearly sure that the absence of evidence does indicate evidence of absence. My subject is the lack of a significant gold coinage among the Durotriges of Dorset, in contrast to every other major coin-using polity in late Iron Age Britain. My aim is to demonstrate that this lack of gold coinage is a genuine phenomenon, and not the result of partial or inadequate evidence; and to suggest some reasons why this situation may have arisen. Before focusing more narrowly on Dorset in the mid-first century BC, we need to consider the background to the importation and the production of gold coinage in Britain. Although there were probably very occasional imports of coinage from the time of the earliest ‘Celtic’ imitations, perhaps in the mid-third century BC, the first significant inflows of gold coin did not occur until at least the mid-second century BC. These began with the ‘large flan’ stater and quarter stater (Gallo-Belgic A), probably struck in central and western Belgic Gaul, in the territories later identified with the Ambiani and the Bellovaci. Their distribution in Britain is focused on the Thames estuary, with the majority of findspots in Essex and Kent (Sills 2003: 136, 153). At roughly the same time, the ‘defaced die’ staters and quarter staters (Gallo-Belgic B) were also imported into Britain, perhaps from the territory of the Nervii (Sills 2003: 185–6).