The Eyrbyggja Saga on Sturla Thiodrekson
Chapter 1 - Herein Is Told How Ketil Flatneb Fares To West-Over-Sea. > Chapter 61 - Snorri Sends For Thrand The Strider.
- attestation: Sturla Thiodrekson sent word from the west offering to join Snorri's attack on Uspak as soon as Snorri was ready
"Sturla Thiodrekson sent word from the west that he would straightway get ready to set on Uspak and his company as soon as Snorri would"
Chapter 1 - Herein Is Told How Ketil Flatneb Fares To West-Over-Sea. > Chapter 62 - Snorri And Sturla Win The Work At Ere In Bitter.
attestation: Sturla was waiting at Tongue in Bitter with thirty men when Snorri arrived
"came to Tongue in Bitter in the evening, and there was Sturla abiding them with thirty men."
attestation: Sturla killed Uspak with a twirl-spear to the midsection while Uspak was exposed on the wall throwing stones
"he was putting himself very forward and casting a stone at Sturla's company, at that very nick of time Sturla shot a twirl-spear at him, which smote him in the midst, and down he fell outside of the work."
attestation: Sturla claimed the kill personally and prevented others from participating so there would be only one account of Uspak's death
"Sturla straightway ran to him, and took him to himself, and would not that more men should be at the slaying of him, because he was fain that there should be but one tale to tell of his having been the banesman of Uspak."