How does Janet Wallach use imagery in Desert Queen: The Extraordinary Life of Gertrude Bell, Adventurer, Adviser to Kings, Ally of Lawrence of Arabia?

Example of Imagery:

"She was brash and immature, and in spite of her dazzling scholastic achievements, Gertrude had failed the most important test of all. Unlike her two friends from home, she had had no one ask for her hand in marriage. She was twenty years old, a snob, a bluestocking, a woman with an 'attitude'; her haughtiness and self-importance hardly appealed to eligible young men, and those who dared to court her were soon dismissed."