THE CAVE CULTURE OF MUSHROOMS. 



67 



there is a great rude arch cut into the rock, and into 

 this we enter, meeting presently a waggon coming forth 

 with a load of stones, the waggoner with lamp in hand. 

 To the visitor who has seen the mushroom caves near 



Fig. 21. Entrance to large subterranean quarry. 



Paris, where it is sometimes necessary to stoop very low 

 to avoid knocking one's head against the roof rocks, the 

 surprise is great on getting a little way in. At least it 

 is so soon as one can see ; the darkness is so profound 



F2 



