Wikipedia
Gartan is a parish in County Donegal, Ireland. It is best known for being the birthplace of Saint Colmcille or Columba, one of the three patron saints of Ireland and one of the most revered saints in the Christian world. Here he founded a monastery in 521. The popular song " Gartan Mother's Lullaby" comes from the area, and has been performed by many artists, including American actress Meryl Streep.
The book "Kenny", by Leona Dalrymple (The Reilly & Britton Co., Chicago, 1917), which may be read online says:
"I often think these days of Kenny's wood-fire tales of the shrine of Black Gartan where St. Columba was born. Colomcille, old Kenny called him around the wood-fire, didn't he? Colomcille, Kenny said, having been in exile, knew the homesick pangs himself and therefore could give the good Irishmen who journeyed to his shrine strength to bear them. I'm not in exile but there are times when I should be journeyin' off, as Kenny says when the brogue is on him, to Black Gartan. The curse of the Celt! Kenny swears there's no homesickness in the world like an Irishman's passionate longing for home and kin. Not that I long for the studio. God forbid! Kenny's the symbol for it all."