[Sca-cooks] special pestle for biscuit?

[Stefan li Rous]

Jim  Chevalier says about biscuit:
<<< Hard enough to be 
kept for sea  voyages and broken with a special pestle in monasteries. But it 
tells us nothing  about size. >>>

Why would a special pestle be needed? What is assumed about the “standard” pestle? That it is of wood? that it is small?

Stefan
--------
THLord Stefan li Rous    Barony of Bryn Gwlad    Kingdom of Ansteorra
   Mark S. Harris           Austin, Texas          StefanliRous at gmail.com
http://www.linkedin.com/in/marksharris
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