Anon comes in a fellow, takes off his crown, kisses it, pours poison in the sleeper's ears, and leaves him.
William Shakespeare. Hamlet
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What creature was it, that, masked in an ordinary woman’s face and shape, uttered the voice, now of a mocking demon, and anon of a carrion-seeking bird of prey?
Charlotte Brontë. Jane Eyre (1847)
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They had their first quarrel, then others, and anon the antagonism turned personal.
Stieg Larsson. The Girl with the Dragon Tattoo (Reg Keeland translation), p.16 (2009)