a stiver was a small coin (originally silver) of the Low Countries; applied to the nickel piece of 5 cents of the Netherlands (one-twentieth of a florin or gulden, or about a penny English).
From: The Modern Theatre:
A Collection of Successful Modern Plays
As Acted at the Theatres Royal, London
Selected by Mrs. Inchbald, Vol. IX. 1811
The Bank Note. Act the Second. Scene I