What is Irish mysticism?

Is Éireannach thú/ Is Gael thú

Most probably because of the 1916 rising and events leading up to this, whereby the Irish rebels fought against the British rule and brought independence to Ireland.

Enya is indeed Irish. She was born and reared in Gweedore, County Donegal.

No. She was an American actress, born in Nebraska.

Peat is a fuel used in rural Ireland alot and is more commonly called Turf. It comes from the bogs that are all over Ireland and is burned as a fuel.