After hanging up the phone, Peter Brown started to prepare. He quickly made a batch of sonic devices, then he called Dave Hill over.
"You take some people and set up the sonic devices on the island reefs closest to us."
Dave Hill knew about the power of these devices and hesitated a bit, saying, "Town Chief, there are two problems with this thing."
Peter Brown smiled and said, "What problems?"
"The first is that I'm worried about theft. If there's no one guarding them, it's very likely they will be stolen."
