I retyped the first part considering your corrections. Can you check if it is OK now? Thank you very, very much.
1) Mr. Otis buys Canterville Chase from Lord Canterville. After that, Mr Otis drives with his family to Canterville Chase. When they arrive there, Mrs. Lucretia Otis sees a blood stain in the sitting-room.
2) Mrs. Umney, the housekeeper, explains (to the Otis) that the stain can’t be removed. She tells them the story of Sir Simon, who killed his wife in 1575.
3) Washington Otis, the eldest son, removes the stain with “ Pinkenton’s Champion Stain Remover”.
4) The stain, however reappears the following morning and Washington applies Pinkerton again.
5) Several nights later, the ghost appears to Mr. Otis. He has got burning-red eyes, matted (synonym) hair, and heavy chains.
6) Mr. Otis is not scared of the ghost and suggests to the ghost a bottle of lubricator for his chains. The ghost feels helpless and humiliated. He is further insulted as the young Otis twins throw pillows at his head.
7) When he is in the corridor, the twins make a mock ghost to scare him. For this reason, the ghost retires to his chamber and decides to stay there forever. Mr Otis’s daughter, Virginia, finds the ghost and he talks to her about his story.
Thank you for making the corrections. Here is the revised version:
1) Mr. Otis purchases Canterville Chase from Lord Canterville and then proceeds to drive there with his family.
To get this information, you can refer to the beginning of the story or the introduction where it mentions Mr. Otis buying the estate and the family traveling there.
2) Upon their arrival, Mrs. Lucretia Otis notices a blood stain in the sitting-room.
To know this, you should read the passage where Mrs. Lucretia Otis first discovers the blood stain in the sitting-room.
3) Mrs. Umney, the housekeeper, explains to the Otis family that the stain cannot be removed and proceeds to tell them the story of Sir Simon, who killed his wife in 1575.
To find this information, you can read the part of the story where Mrs. Umney narrates the story of Sir Simon and his wife's murder.
4) Washington Otis, the eldest son, successfully removes the stain with "Pinkenton's Champion Stain Remover".
To find this information, you can read the part where it mentions Washington using the stain remover to remove the blood stain.
5) The following morning, the stain reappears, and Washington applies Pinkerton again.
To know this information, read the passage where it mentions the stain reappearing and Washington using the stain remover once more.
6) Several nights later, the ghost appears to Mr. Otis with burning-red eyes, matted hair, and heavy chains.
To find this information, read the section that describes the ghost's appearance when he first appears to Mr. Otis.
7) Mr. Otis, unafraid of the ghost, suggests a bottle of lubricator for his chains, which leaves the ghost feeling helpless and humiliated. The young Otis twins even throw pillows at his head, further insulting him.
To get this information, read the part where Mr. Otis interacts with the ghost, suggesting the lubricator for his chains and the twins throwing pillows at him.
8) Eventually, the ghost retreats to his chamber and decides to stay there forever. Mr. Otis's daughter, Virginia, finds the ghost in his chamber and he opens up to her, sharing his story.
To know this, read the section where the ghost decides to retire to his chamber and Virginia discovers him there, leading to a conversation where he shares his story with her.