Dossier number Title 2739849-NL Letter of Joseph Le Perdriel 7267629-NL Dossier of Obscure Matters by Joseph Le Perdriel 1565200-BE Letter to Benoit Peeters 8323792-NL The fall of the 5 chimneys 2652656-NL The mystery of Tram 81 9282361-NL Desombres 8373638-NL First Obscure Convention 7637373-NL Online chat with Schuiten & Peeters 7387389-NL The Dossier B