Short answers, pulled from the story.
Anglo-Saxon rulers began paying large sums of silver to Scandinavian Vikings in the 990s. These payments were known as Danegelds and marked a shift from pure raiding to negotiated tribute.
Modern-day Sweden holds twenty-seven of the approximately thirty known England runestones. Seventeen of these stones cluster around Lake Mälaren in the province of Uppland.
Ulf of Borresta received three separate Danegelds during his lifetime with his final payment coming directly from Canute the Great in 1018. He traveled with Skagul Toste in 991 and Thorkel the High in 1012 before meeting Canute.
Carvers employed distinct styles like Pr3, RAK, and Urnes to decorate the stones. Style RAK is considered the oldest form found on these monuments while Style Pr3 appears alongside U 194 as an early example of the Urnes style in Uppland.
Richard Dybeck found U 344 at Yttergärde in 1868. The stone commemorates Ulf of Borresta who received three Danegelds.