Do you perhaps have more than one catalog? Go to:
File >> Open Recent
Try opening each one listed to see if your photos turn up.
Do you have set some filters?
Thanks, but only one catalog.
I don't believe it is a filter issue. The folders and pictures disappeared from the Folders LIst and Published Services immediately after the Move within Lightroom finished. But I did verify no filters are set.
You may need to go to your most recent backup from a date before you moved things. Unzip the dated backup folder and double-click (control-click) on your named catalog file ending .lrcat to launch it in Lightroom.