I'm just after posting lyrics of Creag Ghuanach and information on it's author on a discussion thread re Westering Home, because I read that Hugh Roberton based the tune of Westering Home on Creag Ghuanach. Well, there seems to be a lot more votes for Creag Ghuanach as being the source for the tunes of Lochaber and Mingulay. Roberton wrote the lyrics of both Westering Home and Mingulay.

re Jim Brown's message just above, "Creag Ghuanach" is a section of "Òran na Comhachaig" and presumably has it's own tune. Also, the poetry is so old that there is likely to be more than one tune associated with it by now.