Attributed to James McMahon. I just got this tune from Harry Bradley’s podcast and it became an instant favourite of mine. Sits very well on the flute, obviously. :~)
>> MISS McGUINNESS [2] (Iníon Mhic Aonghusa). Irish, Reel. A Dorian. Standard tuning. AB. This “Miss McGuinness” is not the usual tune that goes by this name. Source for notated version: from the playing of James McMahon (County Fermanagh) collected in the mid-20th century by Liam Donnelly (County Tyrone and Belfast) [Breathnach]. Breathnach (CRÉ IV), 1996; No. 172, pgs. 80-81.