In this extract both the town (Toune of Dumbartan) and the castle (CASTEL OF DUMBRITTON) are clearly shown by the banks of the River Leven. Fortified from at least the 5th century AD, the basalt rock upon which the castle stands was known as the Dun Breatann, the capital of the old Kingdom of Strathclyde.
Detail from Pont Map 33
See also detail from Pont Map 32 for another depiction of Dumbarton
Dumbarton also appears, in much less detail, in Pont Map 17