sentences:  In response, Amlaíb launched a successful raid on Tamworth (Mercia), probably sometime later that year.However, in 943, when Amlaíb had marched on to Leicester, one of the Boroughs, he and Wulfstan were besieged by Edmund and managed to escape only by a hair's breadth.Peace negotiations followed later that year to the effect that Edmund accepted Amlaíb as an ally and as two northern sources add, ceded to him Northumbria as far south as Watling Street.