THE ROYAL ARTILLERY INSTITUTION. 
41 
Fig. 3. 
points connected with the work and its garrison which strike the casual 
observer, before proceeding to mention the outworks, on which I believe the 
future fate of Metz will in any regular siege wholly depend. 
The first striking feature in the fortification of the city is the immense 
excavation of ditch, and height of parapet and escarp revetment. This wall, 
on the south-east side, near Porte des Allemands, seemed nearly 50 ft. high, and 
the ditch, through which the river Seille flows, looked quite a little valley. 
6 
