Which detail should be included in a summary of Elizabeth Van Lew’s role as a spymaster during the Civil War? She

Which detail should be included in a summary of Elizabeth Van Lew’s role as a spymaster during the Civil War?
She was born in the year 1818.
Her home was used as a safe house.
In 1864, she sent three messages weekly.
She put a message inside an empty eggshell.