Underground Engineering at the Front 



A subterranean passage connecting two distant French trenches. Such is the danger o 

 being shot by enemy sharpshooters while passing from one trench to another, that long ^2"^" 

 municating tunnels are dug. Sappers start from both ends, and meet in the middle. The 

 illustration shows the first connection between tunnels which have been begun a considerable 

 distance apart, and which are about to be united 



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