You're right, Ewan - the tune for TWA CORBIES 2 isn't the right one.

I posted a MidiText version of it in the Twa Corbies thread Noreen linked to above, and a fixed ABC version a little further down the thread. For whatever reason, neither seems to have been harvested. As Malcolm Douglas pointed out in that thread, the tune is here - given for the Breton Liberation Song. The timing is different than what I'm used to hearing for Twa Corbies.