In lord of the flies chapter 7 what is authors purpose in describing house at edge moor?

The author's purpose in describing the house at the Edge Moor is to create a sense of mystery and intrigue. The house is described as being "very old and rambling", with "dark windows and a overgrown garden". This description creates a sense that something sinister might be lurking within the house. This sense of mystery is reinforced by the fact that the house is located on the edge of the moor, which is a wild and desolate place. The author's purpose in creating this sense of mystery is to keep the reader engaged in the story and to make them wonder what might happen next.