After opening an illegal dance school in her attic, Rosie’s ex-husband, Leo Crielaars, and her brother-in-law, Marinus, reported her to the Dutch Kultuurkamer for disobeying the anti-Jewish laws that had gone into effect. Here are their letters of betrayal.

• October 11, 1941 (Leo)
• February 28, 1942 (Leo)
• March 13, 1942 (response from the Kultuurkamer )
• March 21, 1942 (response from the police)
• May 25, 1942 (Leo)
• May 26, 1942 (Marinus)