Thunderbird mail

[Doug Pollard]

Did something about a week ago and havent been able to fix it.   I 
deleted the window to the left of the e-mail list window.  The one with 
the folders in it.  been all over the firefox and thunderbird help. 
Nothing on FAQ so maybe I am the only one that has ever done this or the 
solution is so simple I'm the only one that can't fix it?? I have 
clicked on everything I can find in Thunderbird and can't bring the 
window back.  Seems like it's got to just be a click in the toolbar?    
Thanks for any help.
                                              Doug