The Gesta Danorum (Books I-IX) on Hiartuar
The Danish History, > Book Two
attestation: Hiartuar brought the concealed weapons to Leire, the royal seat Rolf had built and adorned with his richest treasure
"they proceeded to Leire, a town which Rolf had built and adorned with the richest treasure of his realm"
attestation: The Swedes armed themselves at night while the Danes slept drunkenly and launched a surprise attack on the palace
"the Swedes, who had been kept from their ordinary rest by their eagerness on their guilty purpose, began furtively to slip down from their sleeping-rooms"
attestation: Hiartuar triumphed and held a feast, marvelling that not one of Rolf's army had chosen flight over death
"it was matter of great marvel to him, that out of all the army of Rolf no man had been found to take thought for his life by flight or fraud"
attestation: Hiartuar's reign was won and ended on the same day; the Zealanders subsequently killed the Swedes in retribution for Rolf
"the royalty of Hiartuar was won and ended on the same day"