In the opening chapter of 'Anne of Green Gables', we are introduced to Mrs. Rachel Lynde, a well-known figure in the village of Avonlea, who is characterized by her curiosity and tendency to gossip. As the chapter unfolds, Mrs. Lynde is out in her garden when she notices Matthew Cuthbert, a local bachelor, driving his horse and buggy towards Green Gables, the home he shares with his sister Marilla. This sight piques her interest, as she knows the Cuthberts had planned to adopt a boy to help them on their farm.

Mrs. Lynde's assumptions lead her to conclude that Matthew is bringing home the boy they intended to adopt. Her excitement and gossiping nature compel her to speculate about the new arrival and what it means for the Cuthberts and the community. However, her curiosity is soon met with shock when she learns from Marilla that instead of a boy, they have adopted a girl named Anne Shirley.

The revelation stirs mixed feelings in Mrs. Lynde, who is known for her traditional views and expectations. She quickly makes her way to Green Gables to see this unexpected girl for herself, driven by her desire to understand the implications of this decision. On her visit, Mrs. Lynde's demeanor is a mixture of skepticism and intrigue as she prepares to meet Anne.

The chapter sets the stage for the subsequent interactions between Anne, Marilla, and Matthew, while also establishing the tone of community observation that will recur throughout the narrative. Mrs. Lynde's character embodies the societal norms and expectations of the time, offering a contrast to Anne's imaginative and free-spirited nature. Her surprise at the arrival of a girl instead of a boy hints at the themes of belonging and acceptance that will be explored as Anne's journey unfolds.

Overall, this first chapter effectively introduces readers to the setting of Avonlea and the key players in Anne’s life, while establishing Mrs. Lynde as a critical observer of the events to come, thereby creating anticipation for Anne's arrival and the adventures that await her in this new chapter of her life.