empty albums in photos and time machine will not restore
I noticed yesterday that many of my albums in photos are empty. I have separate albums for each year. Thousands of photos are missing. The only one with pictures is the folder I use for this year's pictures but even it is missing photos. Don't know how long the albums have been empty. I have tried to restore from a time machine backup. Have tried two different backups from time machine and neither have restored the empty albums. The time machine back up indicates that it is 142 GB but when I complete the restoration process the albums are still empty except for the current (2018) folder which has some but not all of photos.
What is interesting is the photos library in the TM backup from October 11 is 142GB and the back from November 9 is 8.56 GB. Somehow between October 11 and Nov 9 most of the content of the photos library disappeared.
My time machine backups are on an external hard drive.
Any recommendations?
Thanks very much!
Andrew