From "The Letters of J. R. R. Tolkien" we see what he agreed with his publishers: "Stanley & I have agreed on our policy : Art or Cash. Either very profitable

From "The Letters of J. R. R. Tolkien" we see what he agreed with his publishers: "Stanley & I have agreed on our policy : Art or Cash. Either very profitable terms indeed; or absolute author's veto on objectionable features or alterations." It might have been interesting to see how Tolkien might have vetoed things, or demanded changes. We see from his letters how strongly he viewed many things. We also see at least one critique of a film-proposal - though off-hand I cannot remember who's film-script it was..