Clara wrote three books including The Red Cross-In Peace and War, Story of The Red Cross-Glimpses of Field Work, and The Story of My Childhood. She was also a teacher for twelve years. On the battlefield she was known as "The Angel of the Battlefield" and a Civil War nurse and on the front lines of the battlefield. When she was a teacher she ran a school by herself, but she soon hired a second person to help teach six hundred pupils, together they raised four thousand dollars for a town to build a new school building. Clara would've been the principle but a man said that was not a right position for a women teaching in schools.