Note 162b — Chapter V · OF THE TWO MOUNTAINS FROM WHICH THE NOBLE RIVERS WHICH DIVIDE WALES SPRING
Reading edition
If by the mountains of Eryri we are to understand the Snowdonian range of hills, our author has not been quite accurate in fixing the source of the river Dovy, which rises between Dynas-y-mowddu and Bala Lake, to the southward of Mount Arran: from whence it pursues its course to Mallwyd, and Machynlleth, below which place it becomes an estuary, and the boundary between North and South Wales.