Betsy van der Meer was a classmate of Margrit (or Marguerite) Weinberg at the 1st Montessori School in Amsterdam.
"Marguerite was my best friend in those days. That is why she gave me this little picture. I used to visit her house in the Beethovenstraat frequently. I remember I went there to pick her up for school, but the whole family had disappeared. I hoped they had gone into hiding, but we never heard from them again."