The knight symbolizes the values of the Middle Ages, particularly the idealized version of the era popular in fiction. The story doesn’t delve into historical details about knights’ roles as warriors, instead portraying the titular character as a majestic and self-contained figure who evokes the grandeur and chivalry often associated with tales set in the medieval era: “The knight sat on the black horse. His armor shone in the moonlight” (47). The knight has no name or dialogue in the story, and the children never see his face. These authorial decisions reinforce his role as a symbolic embodiment of the Age of Chivalry, rather than a distinct individual. Many popular tales about knights promote ideals like courage and kindness toward those in need. Accordingly, the knight in this story rides to the children’s rescue on his black steed after they become lost in the fog. The novel closes with Jack dreaming that he and Annie are “with the knight again” (56), reinforcing that the encounter with the knight inspires Jack to move forward on his journey toward overcoming fear.

Later in the Magic Tree House series, Jack and Annie learn that the knight is Morgan Le Fay, who uses her shapeshifting powers to come to the children’s aid in the first three books before introducing herself to them in the fourth. This revelation explains the knight’s anonymity and connects to the knight’s function as a symbol of an idealized, romanticized idea of the Middle Ages. In Osborne’s books, Morgan Le Fay is a kindly enchantress who hails from Camelot, a magical land inhabited by King Arthur, Queen Guinevere, Merlin, and the Knights of the Round Table. Arthurian legends focus on daring deeds and chivalric ideals rather than the historical realities of medieval life, much like the knight’s characterization in this story. As a symbol of the Age of Chivalry, the knight contributes to the story’s intersection of history and fantasy and advances the plot, Jack’s characterization, and the theme of overcoming fear.