He is writing letters to his sister, Margaret Saville, to chronicle his journey and share his thoughts and feelings. Here are the reasons why he writes to her:
* To share his excitement and ambitions: Walton is driven by a desire to achieve something extraordinary and believes his journey to the North Pole will be his claim to fame. He writes to Margaret to share his hopes and dreams, seeking her understanding and support.
* To alleviate his loneliness: As an explorer, Walton is far away from civilization and family. He is often isolated and lonely, and writing letters provides him with a connection to his loved ones.
* To process his experiences: Writing about his journey helps Walton to reflect on his experiences, both the joys and the hardships. He can pour out his thoughts and feelings in a way he might not be able to with anyone else.
* To seek advice and support: Walton often finds himself in difficult situations and looks to his sister for advice and emotional support. He values her opinion and trusts her judgment.
Overall, Robert Walton's letters to Margaret Saville are a testament to his human nature, despite his ambition and determination. They reveal his loneliness, his vulnerability, and his deep longing for connection.