Hi Dick - if you are referring to the Irish set dance by that title, according to "O'Neills 1001", the first part is 8 bars repeated and the second part twice as long, with 16 bars repeated.
I've also just listened to recordings of Claire Keville             [ concertina ], Paddy Murphy [ concertina ], "De Dannan", Orla Harrington [ fiddle ],Tony MacMahon [ accordion ] & Steve Cooney    [ guitar ], Pat Broderick [ uilleann pipes ] and Paddy Moloney and Sean Potts [ tin whistles ].
Claire Keville, Paddy Murphy, Orla Harrington, Pat Broderick and messrs Moloney and Potts play it as in "O'Neill's" but Tony MacMahon and "De Danann" have both parts equal.
The majority from my music collection seems to be for the 2nd part being twice as long, and I'd usually respect the transcriptions in "O'Neill's".
Hope this helps.