lO 



Adams, On the Mole {Talpa europced). 



the ground or even in the centre of the piled-up mound 

 {Figs. 5, 6, 7, II, 12). Cadet de Vaux and all following 

 him represent the fortress with two distinct circular 



/^?'f. II. — a. — Upper circular galler)'. 

 b. — Lower circular gallery. 



N.— Nest. 



Fig. 12. — a, a. — Portions of tunnels which subsequently fell in. 

 ."!!.'!.'!!!showing probable course of these tunnels. 



