Thanks to Allan Conn for the information anout the Borders.... I was responding to an earlier post asking what a reiver/riever was. - I have only heard the word used in relation to the Borders and cattle stealing, tho I know similar escapades went on in the Highlands too (eg at Balindore by Taynuilt, where an ancestor of Robert Burns had to defend the property against some raiders).
I hadn't heard it used in relation to the Western Islands - but I am not a student of history!