Final answer:
You are referring to Abigail Adams, wife of John Adams, the second President of the United States, known for her role as an advisor and for her prolific letter writing.
Step-by-step explanation:
The individual you are referring to is Abigail Adams, the wife of John Adams, the second President of the United States. She is notably remembered for the extensive and eloquent correspondence she exchanged with her husband, expressing her thoughts on various matters, including women's rights, and managing family affairs during the Revolutionary War.
Abigail Adams, through her proactive engagement in both advisory roles and management of the Adams' homestead, played a quasi-official governmental role and set a precedent for the active involvement of First Ladies in American political life.