A:

One is found by the suit of armor.
Another is found by the white flowers next to the flower shop.
You get another piece if you kick the chocobo that crosses the road in the part of the town that has the Chocobo Crossing sign.
Last one is found in the pub after "speaking" with Raine's ghost. After the ghost turns into a cat and you examine it, the final peice is revealed.

Q: What are the only places that you are able to visit when Time Compression occurs if you travel back to the world?