14 POPULAR BRITISH CONCHOLOGY. 



in scarcely a single instance, will the party-wall be cut 

 through. The wood, when thus pierced by a large com- 

 pany of these sappers and miners, is perfectly light and 

 buoyant, rather unfortunately for Ovid's aforesaid simile 

 about grief nibbling at his heart; for we are accustomed to 

 associate lightness of heart with freedom from grief. 



