When does the narrator disappear in the novel, The Turn of the Screw?

The narrator is the unnamed person who speaks in the introduction to the governess's tale, and who tells the reader that he is reading the exact tale that was read to him, from an exact copy of the manuscript. The narrator disappears after Douglas starts reading the governess's account of her experiences.

The initial narrator of The Turn of the Screw disappears when the story shifts from an introductory framing narrative to the governess's manuscript in the novel's first few pages, after Douglas begins reading the text of her account. The story that the governess wrote is what continues to be read by the reader.