This article is from the Final-Fantasy and other Square Soft Games FAQ, by firstname.lastname@example.org (Nick Zitzmann) with numerous contributions by others.
Other than the badge treasure mentioned in article 6.17.3, there is a
much larger treasure to be found in Shevat. The chu-chus in town have
all of the clues, especially the one standing on top of the light, which
is a little hard to reach but gives out the clues needed to find each of
the three keys to this secret place.
One of the stones is found directly to the south of Shevat's castle.
Another is found by searching the doll inside the wrecked house. The
third one is a little trickier, and involves catching fish at the
fountain until you get one which has the rock in its mouth.
Bring all three stones to the transporter below Shevat's living
quarters, and you'll be taken to the secret treasure of Shevat's three