How did the Canterville ghost suffer and who helped him in his redemption?

In "The Canterville Ghost," the ghost suffers as a result of his inability to frighten the Otis family. When the ghost first appears to the family, for example, and tries to scare them by rattling his chains, Mr Otis offers him some Tammany Sun Rising Lubricator. This reaction causes the ghost to feel angry and humiliated:

Never, in a brilliant and uninterrupted career of three hundred years, had he been so grossly insulted.

In another incident, the ghost comes face to face with what he thinks is another ghost. Terrified by the sight before him, the ghost flees the scene when, in fact, it is nothing more than a dummy made by Washington Otis and the twins.

As the ghost's humiliation continues, he seeks his redemption in the Garden of Death where he can rest undisturbed. To reach this place, he enlists the help of Virginia Otis at the beginning of Chapter Five because she is the only member of the family who has not insulted nor humiliated the ghost. She is kind-hearted and gentle by nature, making her the ideal person to pray for the ghost's forgiveness.