Why did Georges think that Helene redirected her affections towards Walter Rogers?

Papa Chibou (Paul Muni), the elderly caretaker of Musée Pratouchy, a Parisian wax museum, feels a strong kinship with the figures, particularly with that of Napoleon. He spots at the waxworks a romantic young couple, Georges (Russell Gleason), a lawyer, and Helene (Marguerite Churchill), the daughter of a stern judge (Lester Lonergan) who disapproves of his daughter's choice and forbids her to see Georges. Papa Chibou suggests to them that they can still stay in touch, without disobeying her father's directive not to speak with each other, by placing secret personal messages in the pockets of Napoleon's uniform. However, a missing letter and confusion in communication causes Georges to arrive at the mistaken conclusion that Helene has redirected her affections towards a foolish young man (Walter Rogers), who is unworthy of her and excessively preoccupied with his stylish personal appearance and elegant clothing.

A missing letter and confusion in communication caused Georges to arrive at the mistaken conclusion that Helene has redirected her affections towards Walter Rogers (a foolish young man), who is unworthy of her and excessively preoccupied with his stylish personal appearance and elegant clothing.