The Plym, Devon
Historical Description
Plym, The, a river of Devonshire, rising in Dartmoor, at Plym Head, 3 miles E of Sheepstor, and running about 16 south-westward and southward to Plymouth Sound at Plymouth. It is sometimes called the Catwater, and its lower or estuarial reach is generally so called.
Transcribed from The Comprehensive Gazetteer of England & Wales, 1894-5