Final answer:
The solicitor who serves as an intermediary between Animal Farm and the outside world in George Orwell's novel is Mr. Whymper, who is a small-time solicitor utilized by the pigs to sustain the farm's commercial interests.
Step-by-step explanation:
The name of the solicitor who serves as an intermediary between Animal Farm and the outside world is not included in the list of characters provided, such as GEORGE HENDERSON, HENRY PETERS, LEWIS HALE, MRS PETERS, and MRS HALE, because they belong to a different literary work, which is unrelated to Animal Farm. In George Orwell's novel Animal Farm, the solicitor who acts as an intermediary is Mr. Whymper.
Mr. Whymper is a sly-looking little man with side whiskers, a solicitor in a very small way of business, but sharp enough to recognize the economic potential of the farm. The pigs start using him to communicate with the human world, sustaining the commercial interests of Animal Farm. Despite not being a central character, his role is crucial as it symbolizes the breach of one of the seven commandments of Animalism, and shows how the pigs begin to resemble human capitalists, which is a significant theme in Orwell's work.