THE STORY OF THE BEAVER. 



57 



After the walls of twigs, stones and mud have dried they resist all attempts of 

 the beaver's worst enemy, the wolverine, to break through them, and in 

 winter when they are frozen trappers find it hard work to make an open- 

 ing in them, even with an axe. Every year a fresh coating of mud is put 



BEAVERS AT WORK AND PLAY. 



upon the lodges, and in a few years the walls attain several feet in thickness. 

 When the beavers have completed their dam and lodges they next pro- 

 vide a place of refuge to which they may escape in time of danger. This 

 refuge consists of a secret chamber dug in the bank on the opposite side of 



