Is Lem Harvey real in the book Carry on mr Bowditch?

In the book "Carry On, Mr. Bowditch" by Jean Lee Latham, Lem Harvey is a fictional character. He is not a real historical figure but rather a composite character created by the author to serve a specific role in the narrative. Lem Harvey represents a mentor and friend to the protagonist, Nathaniel Bowditch, helping him navigate his challenges and growth throughout the story.