Notes have disappeared

Hi,

My MacBook Air had High Sierra as the OS - I had a number of issues with the OS and was eventually "forced" to have Mojave installed. All my data was restored from a Time Machine backup using Migration Assistant.

Everything looked OK, until I opened Notes and all my data was gone. To the best of my memory the notes were "On My Mac" in other words they were not on iCloud.

I have searched through various items on the Apple Community forums and cannot find how best to retrieve my Notes data?

Have tried restoring (with no success):

(a) the files in ~/Library/Containers/com.apple.notes/Data/Library/Notes/

and

(b) ~/Library/Group Containers/group.com.apple.notes

Anyone have any ideas?

Kind regards,

Antonio