Thanks Mike.
I have Finder searched my internal & external again. It is not to be found.
Just created a new Cat and imported the same 131 photos via add method. Went into Identity Plate, had my name there already and added Test to the ID plate.
Chose back up when LR next exits. Showed the path would be my user home folder, the only user. It created a folder named Test and the cat & BU was there, but not in Pictures Folder, where I thought the default location is. Maybe I should have chose Pictures as the place to put it.
This incident in not important. I have delivered the files to my friend. But if he wanted prints from the TIF files I would have lost all the LR Develop work.
Just hoping this will not happen again when doing a larger more important project. Guess I need to be very attentive when creating a new cat.
thanks for your reply,