I totally gave up on this one, lost my patience and rushed it in the end. It's been a while since I've done some Black 'n White stuff, so in hindsight I think it worked out okay. The problem I find when doing this sort of thing is I can end up putting in too much detail - transforming it into a grey mess, so I guess the rushed ending had its merit.
Its an illustration of Eowyn and her efforts to slay the Fell Beast (in the Lord of The Rings), just before she destroys the Witch King, a foe that:
'...no man can kill...'
A wonderful twist on the part of Tolkien.