It is a symbol of Irish art. The cracked looking-glass of a servant.

-Joyce,James Augustine Aloysius
  Ulysses.

There is no looking-glass here and I don't know what I am like now. I remember watching myself brush my hair and how my eyes looked back at me. The girl I saw was myself and yet not quite myself. Long ago when I was a child and very lonely I tried to kiss her. But the glass was between usöhard, cold and misted over with my breath.Now they havetaken everything away.What am I doing in this place and who am I?

-Rhys,Jean pseudonym of  Ellen Gwendolen Rees Williams
  The consciousness of Antoinette Mason/Bertha Rochester at a point of intersection with the text of Jane Eyre. Wide Sargasso Sea, pt.3.

Women have served all these centuries as looking- glasses possessing the magic and delicious power of reflecting the figure of man at twice its natural size.

-Woolf, (Adeline) Virginia ne¤  e Stephen
  A Room of One's Own, ch.2.