A while before the Vernacularly Fastened Door was opened, Olaf told the Baudelaires to ask Dewey Denouement about their parents, a particular night to the opera (La Forza del Destino), and a box of poison darts. The details of this are still unclear, but it implies the Baudelaire parents (Beatrice and Bertrand) killed Olaf's parents. Point 9 of 13 Shocking Secrets You'll Wish You Never Knew About Lemony Snicket mentions Lemony Snicket helped Beatrice commit a serious crime. SO, this could be referencing Lemony and Beatrice stealing the sugar bowl. Why Beatrice, Bertrand and Lemony would kill Olaf's parents is unknown, but it may explain how Beatrice and Bertrand got the Baudelaire fortune. It would explain why Olaf is a financially poor Count, a title usually applied to royal/rich people. It would also explain much of Olaf's motives.
Whether Lemony or Jacques Snicket knew of their sister taking a box of poison darts to the Opera to allow Beatrice and Bertrand to kill Olaf's parents is unknown; though, given that Lemony loved Beatrice, we can assume he would have interfered if he had known.
- The Penultimate Peril (Mentioned only)