Spent 2 hours importing various CD's. Changed the iTunes media folder to be in my music folder. It then asked about copying files

clicked ok..
This then duplicated every file and left a broken link behind for each song...
Now I have restored the folder to normal, by deleting them from the iTunes program but not from the PC. I have music that I have downloaded previously but the imported CDs have gone walk abouts.
Any ideas where to find them?