Final answer:
Marilla wanted to send word for a 'boy' to help on the farm in 'Anne of Green Gables', which leads to the arrival of Anne Shirley when a mix-up occurs.
Step-by-step explanation:
Marilla sent word out to Mrs. Spencer that she wanted a 'boy' to help with work around the farm. However, due to a mix-up, Mrs. Spencer brings a girl, which creates the premise for the novel 'Anne of Green Gables' by L.M. Montgomery.
This misunderstanding and subsequent adjustment set the stage for the rich narrative about identity, belonging, and the definition of family that unfolds throughout the book.