So what does 'Louren Fair' mean? If it is a fair, why is anyone killed at it, outnumbered? Whereas, if 'lour', in the sense of threaten or look loweringly [Chambers], did have the specialist meaning of battle, and it were unfair [as he was outnumbered and could 'neither fight nor flee'], would that not make some sense?
I repeat, that was how Robin Hall, who was a friend of mine from old Princess Louise days when he first came to London, always glossed that line before singing the song.
So, Jim McLean, yours as repro'd 2 posts above, where you say 'as sung by ... Hall', does not represent what he thought he was singing. Did you know him, or ever talk to him about it?