The Collaborative International Dictionary of English v.0.48:

Pannel \Pan"nel\, n. [See Panel.]
   1. A kind of rustic saddle. --Tusser.
      [1913 Webster]

   2. (Falconry) The stomach of a hawk. --Ainsworth.
      [1913 Webster]

   3. (Mil.) A carriage for conveying a mortar and its bed, on a
      march. --Farrow.
      [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

PANNEL, Scotch law. A person, accused of a crime; one indicted.