South-Western Ports

The Ravenna Cosmography’s sequence of 36 harbour estuaries begins thus:

TraxulaAxiumMaviaSarnaTamarisNaurumAbonaIsca

Locations of the first one and last two are reasonably certain, but what about the five in between?  There are two main possibilities:

Theory One

Theory Two

Axium

river Exe past Exeter

river Axe past Axmouth

Mavia

Carrick Roads past St Mawes to Truro

river Dart past Dartmouth to Totnes

Sarna

river Camel past Padstow to Bodmin

river Avon past Burgh Island

Tamaris

Taw + Torridge into Barnstaple Bay

Tamar estuary past Plymouth

Naurum

river Parrett to Bridgwater & Glastonbury

Taw + Torridge joint estuary

A working hypothesis does not need to be correct to be useful; it merely needs to provoke clear thought.  So there is no shame in admitting that we used to be utterly convinced by theory One, because the similarity between Mavia and the name St Mawes provided a vital “crib” for code-breaking the Cosmography.  Now theory Two seems much better.

The decisive argument is that the name Tamaris can now belong to just one estuary in Britain, not two.  Also the other three names fit slightly more comfortably under theory Two.  See the individual names for the detailed logic in each case, but note that not much Roman-era archaeology has been reported near the mouth of any of these estuaries.  Also theory Two pulls two ports down to the south coast of Devon, quite close together, where one might guess that they traded with Gaul and Iberia, rather than the north coast, where they might have traded with Wales and Ireland.


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Last edited 14 August 2019     To main Menu