Answer the questions briefly.

How did Marian discover that 'Beauty has ramparts nothing can destroy?

Here beauty refers to the bond of a mother and daughter and ramparts means that no one can trespass that bond. With her mother, Marian was quite different. They played together contentedly, or went for walks. It was always a pleasure to go for a walk with Marian. She loved to see small, delightful things; a new bud, a wild rose, or thistledown floating like magic through the air, would bring a dreamy softness to her eyes, a lightness to her feet. Released, enchanted, she would run over springy grass, among kindly trees; it was her unassailable world. 'Beauty has ramparts nothing can destroy.' Marian had already discovered that.