Mailboxes Lost in Space!

I upgraded to Lion some time ago, and had previously kept all my internet programs in a dedicated folder while I ran Snow Leopard.

When I installed Lion, it installed an updated version of Mail in the applications folder, though when I ran it it did not find my mailboxes.

I ran it again several days ago, and it showed all my mailboxes without problem, so I then deleted the older version of mail that I used in Snow Leopard.

Problem is, when I open Mail now, none of my older messages are there. I have Time Machine running on a 1TB external disk, but cannot find where the mailboxes are hidden.

Can anyone help me to recover my old messages and settings?

 

Puevlo, many thanks for that, I will try it as soon as I get home from work!

Will post here if it is successful, or if I find that I cannot do the restore.

Thanks again!

 

That worked perfectly, so my thanks go to Puevlo!

The way that I managed to get my old mail back was as follows:

1. Created a folder on my desktop named Old Mail
2. Followed Puevlo's advice to find the old mailboxes from the date I lost them
3. Restored them to the Old Mail folder I just created on my desktop
4. Used Finder >> Go and held the Option Key to reveal the ~/Library on my Mac
5. Copied all the files from the ~/Library/Mail/V2 folder to another Backup folder on my desktop
6. Deleted the files from the Library
7. Copied in the files from my Old Mail folder into the ~/Library/Mail/V2 folder
8. Restarted Mail and allowed it to import the mailboxes

It may have been a bit convoluted, but it worked perfectly. I hope the above steps will help someone else who finds themselves in the same predicament.