IO4 



BOOK V. 



Excavations of this kind were called by the Greeks tcpwrrrai for, extending 

 along after the manner of a tunnel, they are entirely hidden within the 



THREE INCLINED SHAFTS, OF WHICH A DOES NOT YET REACH THE TUNNEL ; B REACHES THE 



TUNNEL J TO THE THIRD, C, THE TUNNEL HAS NOT YET BEEN DRIVEN. D TUNNEL. 



