From a New York Times obit Richard Sandomir headlined “Hannah Pick-Goslar, a Presence in Anne Frank’s Diary, Dies at 93”:

Hannah Pick-Goslar, whose close friendship with Anne Frank was memorialized in what became “The Diary of a Young Girl,” the record of Anne’s life in hiding from the Nazis, died at her home in Jerusalem.

The two girls’ friendship began when they were in kindergarten in Amsterdam in 1933. Twelve years later, Mrs. Pick-Goslar (then Hannah Goslar) spoke to her friend for the final time through a barbed-wire fence stuffed with straw at the Bergen-Belsen concentration camp and tossed her scraps of food in a sock.