Why even the fiercest Viking warrior steered clear of Scotland

Icelandic sagas carried a warning for Norsemen

A-Vikings And The Viking Age

Vikings were scared of Scots - World News - NZ Herald

The Heimskringla: A History of the Norse Kings, vol. 2

How did Vikings react to the celts of Scotland who were probably as savage as they were? - Quora

5 fiercest Viking warriors: From Harald Hardrada to Ivar the boneless

How did Vikings react to the celts of Scotland who were probably as savage as they were? - Quora

HQ – Emma's Biblio Treasures

Guided Tours of Mann

An Account of the Danes and Norwegians in England, Scotland, and Ireland, by J. J. A. Worsaae—A Project Gutenberg eBook

Vikings Myths

Espionage/Intelligence, Coldspur

The Project Gutenberg eBook of Norse Mythology, by Rasmus Björn Anderson

How did Vikings react to the celts of Scotland who were probably as savage as they were? - Quora

Why did the Vikings conquer England and Scotland but not so much Ireland and Wales? - Quora