Well Roger, it's kind of you to place such confidence in my diagnostic skills! I don't know if I'll deliver to your satisfaction.
Anyway; this is what I think happened:
you had photos in iPhoto. You used Time Machine (TM) to create a BU on to your EHD, keeping the original photos where they started, in iPhoto. Then you "slid" (dragged) the TM copy back into your Home Folder on your Mac.
This brings us to Craig's suggestion of a "conflict" in Finder when it sees your original photos in iPhoto, and a duplicate, created by TM, now in your Home Folder. That might generate a Terminal message....(I'm pretty clueless about Terminal because it's too scary for words to the inexperienced-me!)
Since we last communicated, you've found some, but not all, of your photos.
Craig—any thoughts on my view of things and, more importantly for Roger, how he can reverse the process or otherwise get his lost photos back?
Roger, thank you for your cooperation and detailed description of what you did.. We've come a long way from your initial post!
Craig....ideas?
Ian