"the only advice is to retreat across the Liffey"
River Liffey
Creative Commons Attribution Share AlikeRiver Liffey - Credit: Jonathan Billinger

The Liffey (Irish: Abhainn na Life) is an Irish river that rises in the Wicklow Mountains and reaches the Irish sea at Dublin Bay. It runs through Dublin, the capital of Ireland.

In Gwyn Jones' and Thomas Jones' 1948 translation of The Mabinogion, the Welsh name Llinon is translated not as Liffey but as Shannon (Irish: Abhain na Sionainne).