Here's the missing verse (from a Kate & Anna McGarrigle youtube vid):

Let's drink a cup to what went down
There's not much left to reveal.
I think I changed my mind after what went down
As to who in the end got the better deal

Also a correction to verse 2:

What did you do with your burden and your cross
Did you manage it yourself or did you crack?

I'll stick by my hearing:

Give me your hand for the parting clutch..............