Fetch (as defined in Brewer's Dictionary of Irish Phrase and Fable): a preternatural vision of a living person, usually seen by a relative or friend. If occurring in the morning the visitation was a sign that the person, whose doppelgänger it was, would have a long and prosperous life; if in the evening it was a portent of imminent death:
She only looked with a dead, dead eye,John Banim, (1798 - 1842); 'The Fetch' (1857).
And a wan, wan cheek of sorrow:
I knew her Fetch!--she was called to die,
And she died upon the morrow.
Photos: Burfitt Autumn/Winter 2008 collection, via about some things.