Het geheim van het Riethof

The long-running Dutch comic series Het geheim van het Riethof began in 1956 with a single issue from publisher NV Altiora. This standalone story presents a complete mystery set at the titular Riethof estate, blending local atmosphere with a classic puzzle. Though brief in its publication, it stands as a notable early example of Dutch adventure comics, associated with the post-war era of European bande dessinée.