Disappearing files

I have had terrific fast and good uidance with my, what turns out to be, my simple problem. Yes, I'm still using 4.1 LR.

Many many thanks to all for this help.   DesE

As I stated it is version 4.1.  I have since had the advice I am using the wrong import dialog.  It seems I should had used Add instead of Move.   Many thanks anyway for such a prompt reply

Des

Assuming you use the ancient Lightroom 4.1 that is now Lightroom Classic, then the answer is simple. At the top of the import dialog, you can choose between 'Add', 'Copy', 'Copy as DNG' and 'Move'. If you just want to add images to the catalog, and keep them in their current folder, then choose 'Add'. It sounds like you chose 'Move', so Lightroom did not only add them to the catalog but also moved them to another location (as defined in that same import dialog). That is why you saw them disappear from their current folder one by one during the import.

Which exact version of Lightroom do you use (Classic, CC or perpetual license)?

Which option do you use for import?

From which folder the pictures were removed?

Please described more detailed.