What does oliver decide to do at the end of chapter6?

Oliver has been with Mr. Sowerberry for several months now, and leads the procession at many infant funerals, as measles has caused a large number of children's deaths. Mr. Sowerberry is being very kind to Oliver, and he is growing more comfortable. Noah is jealous of Oliver's relationship with Oliver, and begins to taunt him even more. One particular evening, Noah relentlessly goads Oliver about his mother, calling her a bad woman. Eventually, Oliver, filled with rage, attacks Noah, grabbing him by the throat. Noah screams that Oliver is going to murder him, and Charlotte and Mrs. Sowerberry panic. Charlotte begins hitting Oliver, Mrs. Sowerberry scratching his face, and Noah pummels him. When it is all over, Oliver is locked in the cellar, and Mrs. Sowerberry collapses into tears. They leave him in the cellar, saying they fear he will kill them with Mr. Sowerberry out of the house. Mrs. Sowerberry sends Noah to tell Mr. Brumble about the incident.