The Collaborative International Dictionary of English v.0.48:

Sconce \Sconce\, v. t. [imp. & p. p. Sconced; p. pr. & vb. n.
   Sconcing.]
   1. To shut up in a sconce; to imprison; to insconce. [Obs.]
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            Immure him, sconce him, barricade him in 't.
                                                  --Marston.
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   2. To mulct; to fine. [Obs.] --Milton.
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