What town on the Castletown River was the home of a famous radiologist who lived from 1900-1979
Peter Kerley: Sir Peter Kerley CVO (1900–1979) was a radiologist from Dundalk, Ireland. Dundalk: Dundalk ( , Irish: "Dún Dealgan" , meaning "Dalgan's fort" ) is the county town of County Louth, Ireland. Dundalk:  It is on the Castletown River, which flows into Dundalk Bay, and is near the border with Northern Ireland, halfway between Dublin and Belfast.
Dundalk