Continuity mistake: Dot is going through the agony aunt mail: she mentions the woman with 9 kids who does not want to deny her hubby, and you can distinctly see her put back on the table her left hand, holding a letter. Cut, and that hand is now hovering above the table. (00:19:55)
Continuity mistake: During Miss Fisher's conversation with John/Giovanni/Miss Greenthumbs in the building stairway, when she asks him about Artemis he inhales from the cigarette. Smoke is present and visible, disappears in the reverse shot, back to full visibility as the original angle returns, and no smoke at all when we get back to the reverse shot. (00:15:35)
Continuity mistake: When Miss Fisher and Jack find Letitia, her hat is tilted on her head the opposite direction in the two following shots. The bag she dropped in one shot has disappeared entirely in the one when she was rolling down the stairway. (00:30:30)
Answer: Louisa's watch was broken during the struggle to get away from her attacker.
Bishop73