Despite the annals clearly evolving tendency,their solid form and loan of events and quotes,the hagiographies represent a part of the contem-porary historiography, where it is possible, withthe knowledge of the fixed fixtures, to approachspecific elements of the individual writing 28.Regarding the noted Durham copies, they typi-cally show successive changes or additions withinterpolations, which in many cases have not beenchronologically rendered. Likewise, both the writ-ing and the wording show that there were numer-ous different actors. Therefore, it is difficult, chro-nologically, to determine the individual interpola-tions.Regardless of this, it is possible to trace corehistorical elements in the texts e.g. the very rarename Guthred filium Hardacnut, where Hardacnut islinked to the Danish royal family. It is beyond anythought that the monks of Durham should be ableto invent such a distinctive name. Still, the onlyproviso here could be that the name was not partof the original text in Historia, but first was inter-polated during the time after Cnut the Great andhis son Hardecnut.However, a few essential Viking hoards haveprovided new numismatic information and evi-dence which legalizes the name Hardecnut.
A Silverdale coin with the inscription ‘Airdeco-nut’proves the existence of the name before Cnutthe Great's time. The design of the coin relates toknown Cuerdale coins of the kings Siefredus andCnut (c. 895-902).Two Viking hoards from Cuerdale and Silver-dale are dated to the time around 900. The BritishMuseum writes about Silverdale -‘The artefacts and coins together bear witness todiverse cultural contacts and a wide Vikingmercantile network, extending from Ireland in theWest to central or northern Russia and the Islamicworld in the East. The hacksilver and weight-adjusted armrings served as a form of currency in abullion economy. This perspective further reinforcesthe picture gained most recently by study of the findsfrom the Vale of York hoard, discovered only in2007. Probably the most significant connection toemerge from a preliminary examination of theSilverdale finds is the similarity shown by a numberof the objects to pieces from the rather larger Viking-age hoard discovered at Cuerdale, near Preston inLancashire in 1840. The Cuerdale hoard can bedated to c. 905-10 on the basis of the combinationof the coins. The Silverdale hoard contains manyof the same types, and was apparently buried atmuch the same time, or possibly slightly earlier.While further work may produce a more secure date,an approximate date of c. 900-910 seems safe atpresent ’.The approx. 44 kilogram of silver contained inthe two hoards, including additional 617 coins fromthe Vale of York hoard deposited 927, gives a goodidea of what size of lucrative import-export29busi-ness there was manage by the jointly kings fromDublin and York. The sources mention that kingSigfred of York maintained a fleet of 40 units.