The Eyrbyggja Saga on Nail
Chapter 1 - Herein Is Told How Ketil Flatneb Fares To West-Over-Sea. > Chapter 18 - Men Will Ransack At Mewlithe; Thorarin Falls To Fight.
attestation: Nail, a large and fast man of Scottish descent, accompanied Alfgeir to Mewlithe
"with him a fellow of his who was called Nail, a big man, and swift of foot; he was Scotch of kin"
attestation: Nail panicked at the sight of weapons and fled into the fells, becoming witless with fear
"Nail was the foremost; but when he saw them threaten with their weapons, he blenched and ran forth and up into the fell, and there became one witless with fear"
attestation: Nail nearly ran himself to exhaustion and was captured at the place afterward called Thrall-scree
"they came to that place which is now called Thrall-scree, and there Thorarin and his folk got Nail taken, because he had well-nigh broken his wind"