In her book Forgive ​ — But Do Not Forget, author Sylvia Salvesen said of women Witnesses who were her fellow inmates in a Nazi concentration camp: “Those two, Käthe and Margarethe, and many others, helped me a lot, not only by their faith but in practical matters.
Raamatu Forgive — But Do Not Forget (Andesta, kuid ära unusta) autor Sylvia Salvesen ütles naistunnistajate kohta, kellega ta natslikus koonduslaagris koos vangis oli: „Need kaks, Käthe ja Margarethe, ning paljud teised aitasid mind väga palju mitte ainult oma usuga, vaid ka praktilistes asjades.