I inadvertently archived some important email templates in Mail that were saved in a custom folder under "On My Mac" (I was trying to work out how to export them). They all disappeared from the folder and now I can't find them on my Mac using Finder. In fact, I can't find any email files. I've looked closely at Mail sidebar but I can't see any reference to Archive (re. Help doc). Where are my templates? How do I get them back into my Mailbox?