I've had a go. Maybe Wolfgang can correct my mistakes:

JOHNSTON(E)
(Trad)

Johnstone he was riding along as fast as he could ride
Till he thought he heard a woman, he heard a woman cry

And Johnstone getting off his horse and searching the woods all round
Till he came upon a woman with her hair pinned to the ground

And Johnstone being a man of his own and being a man and bold
He has taken off his overcoat to cover her from the cold

Now woman, my dearest woman, who that brought you here for thus far
Who that brought you here this gay morning with your hair pinned to the ground

Oh it was three bold and struggling men with swords keen and hard(?)
Who that brought me here this gay morning with my hair pinned to the ground

And Johnstone getting on his horse and the woman getting on behind
They rode down that lonesome highway their fortunes for to find

As they were riding on along as fast as they could ride
She has thrown her fingers to her lips and gave three shivering cries

And out sprang three bold and struggling men with swords keen and hard(?)
Who that commanded Johnstone, commanded him to stand

Oh I will stand, said Johnstone, I'll stand, then said he
For I never was in all of my life afraid of any three

And Johnstone he killed two of them, not minding the woman behind
While he was at the other one she stabbed him from behind

And the day was free and a market day and the people all passing by
Could have seen this awful murder, could have seen bold Johnstone die

As sung by Sweeney's Men

Transcribing made me realise for the first time that this is no variant of Child #088 (Young Johnstone). I have another version of this, by Ian Benzie, but no notes or info on origins at all.