The first time Mademoiselle decides to leave her position as governess she tosses her suitcase onto the bed with its opening facing the head of the bed. She throws a couple of items into it. In the next shot, seconds later, the suitcase is full and the opening is facing the foot of the bed.
When the students are alone in the classroom after teacher Henriette Deluzy-Desportes steps out, there is a close-up of six students standing at the far left blackboard. But on the next cut after Deluzy-Desportes re-enters the classroom, the orientation of the six students standing at the blackboard has now changed.
A theatrical poster lists a performance date as Wednesday, 11 June 1846. In that year, June 11th was a Thursday.
The Duchess of Praslin is seen licking envelopes in which she has placed letters to her husband, the Duc de Praslin. This film is set in the 1840s; gummed envelopes would not be invented for another 100 years. Correspondence in the 1840s would not be placed in a #10 business envelope either, as seen in the film. The letters would be placed in another sheet of paper and then sealed over with a wax seal or simply folded over and sealed with a wax seal, and sometimes a ribbon would be set in the wax as well.
Most of the story takes place in 1847, but the Duc wears a wing collar, and other men wear other neckwear styles that did not yet exist in the time of Louis Philippe.
At around 1:03:59 in the movie, the Duc and Duchesse Du Praslin attend the opera. A program is briefly shown for an opera in 3 acts. The opera features Helene Picard singing the role of Mallika, and Minne Altchevsky singing the role of Ellen. The only opera to include these two roles is Lakmé, by Leo Delibes. Though the action of this movie takes place in the 1840s, Lakmé was performed for the first time on 14 April 1883.
As he lies ill, the governess has Reynald count the tangerine segments. She starts out counting the first three with him. She interrupts her own count to speak with the Duke, but Reynald continues on. When the governess resumes the count with Reynald, the actual tangerine piece is number 7, but she calls it number 10 and continues the count from there.