In the First Part, after Fantine meets Felix at the dance, a shot of the cards advertising the dance blow one by one off of a table, until they are all gone. Driven through the top of the table can be seen the heads of flathead metal wood screws, which were not invented until the middle 19th Century, or decades after the story takes place. See more
[referring to the police and the court
They don't know their line of business too good. They don't believe nobody. I tell them I'm old Champmathieu, and they call me a liar. The other fellow says he's Jean Valjean, and they call for a doctor. But a fellow knows who he is don't he? They're a bit dense.
Le président du jury
[discussing Valjean nearby
No, justice won't be flouted like this. They've issued a warrant to rearrest the man at all costs.
They talking about me? Did they change their minds? If they find ...