I just opened my Keychain and discovered to my horror that the secure note I keep all my important data on has gone blank - last modified yesterday morning. And yes, I did click the little box and enter my password. Other secure notes are working perfectly fine, just this one isn't - with everything I need to function on it! I have been making Time Machine backups but I've no idea where this note might be stored and how to restore it as it's not a distinct document, just data within the Keychain application. Any help, anyone, please?