summarize chapter 7 of the book"And Then There Were None"

Chapter 7 of "And Then There Were None" begins with the guests discussing the strange poem that hangs in each of their rooms. They try to decipher its meaning but cannot come to a clear conclusion. Soon after, they gather for dinner and discuss the seemingly accidental deaths that have occurred on the island. The guests, unsettled by the deaths and increasingly suspicious of one another, begin to question each other's motives and backgrounds. Detectives Armstrong and Blore take a walk on the beach and discuss their suspicions about Dr. Armstrong's involvement in a previous incident where a patient died under his care. Meanwhile, Emily Brent and Vera Claythorne confront their fears and express doubts about each other's innocence. The chapter ends with tensions rising among the guests and uncertainty filling the air as they await further revelations about the truth behind their predicament.