Playing along with it, it's:

Cm
Our Lords are to the mountains gone
                Bb
A-hunting of the fallow deer
Cm
They have grippit Hughie Graham
    Eb             Bb       Cm
For stealing of the Bishop's mare.


then, on verse 3 it's

F
Loose my right arm free, he says
                        Cm
Put my broadsword in my hand

There's none in Carlisle town this day
      Eb             Bb    Cm
dare tell the tale to Hughie Graeme.


This is probably the simple version, i.e. more chords can be slotted in but I think the above is a basis to work on!