 It has also been suggested that the Hiberno-Norse in Dublin were prompted to colonise the Cumbrian coast after being temporarily expelled from the city in 902.The successful attempt by Ragnall ua Ímair to conquer the Danes in York (around 920) must have led to the Dublin – York route through Cumbria being frequently used.In Westmorland, it is likely that much colonisation came from Danish Yorkshire, as evidenced by place-names ending in "-by" in the upper-Eden valley region (around Appleby), especially after the eclipse of Danish power in York in 954 (the year of the death of the Norse King of York, Erik Bloodaxe, on Stainmore).