How do you interpret the action of the ghost when he gifts Virginia a box of his family jewels? Chapter 6

The gift of the box of jewels for Virginia was the ghost's way of showing his gratitude for what she had done for him. As Virginia stepped forward and laid a large cross made of pink and white almond-blossoms on Sir Simon's grave, the moon came out from behind a cloud and flooded the churchyard with its silent silver. The nightingale struck up a note in a distant copse. Virginia thought of the ghost's description of the Garden of Death where a soul attains peace and beauty at last, and her eyes became dim with tears at that thought. She had truly felt for him and that is the reason why the ghost achieved salvation. Therefore, it seems quite natural on the ghost's part to show his appreciation for her will to help him as well as actually succeeding in the endeavour.