 de Courrière was interested in occultism and found herself involved in a Black Mass affair that nearly went awry and earned her a month 's stay in a psychiatric hospital.In the early morning of 8 September 1890 the Bruges police were informed that a naked woman was parading on the fortresses near the Smedenpoort.She showed signs of mental disorder and was taken to the Sint-Juliaan psychiatric institution in the Boeveriestraat where she was identified as Berthe de Courrière.