The first line:
    A cushion of white grass. 
No fault.  
  
    The second line:
    A withered trunk bursts with fresh vetch. 
An old man takes a wife. Nothing but gain.  
  
    The third line:
    A weak beam. 
Misfortune.  
  
    The fourth line:
    An ample beam. Fortunate, 
unless there has been stinting.  
  
    The sixth line:
    Fording, wading, head submerged. 
Misfortune, but without fault.