Why did dictating to a typist affect the style of Henry James’s late novels?

In the final phase of his career, Henry James’s prose style became increasingly allusive, dense, and charged with symbolic imagery. This late "manner" was influenced in part by his practice of dictating his work directly to a typist.1

This shift in his creative process, combined with his persistent search for methods to project subjective experience through flexible prose, allowed him to move away from the minute, realistic descriptions of his earlier work. Instead, he focused on showing a small group of characters in tense situations, utilizing multiple angles of vision to explore their internal dramas.1