Where and when do the children conjecture about this beast? (lord of the flies)

In chapter 5 of the book "Lord of the Flies", the boys had a serious meeting at the shore. They talked about the beast. Jack said that there is no beast since he did not find one when he roamed all over the island. Phil declared that the beast comes out at night because when he woke up from a dream, he saw something big moving in the dark. Fortunately, it was only Simon not a beast. Percival then claimed that the beast comes out from the sea. Piggy wondered if the beast was a ghost. After a lot of arguing about the beast and where it came from, the meeting disintegrated and some of the boys went away to hunt for the beast in the island.