D O C U M E N T 4 5 7 M A R C H 1 9 2 5 7 1 1 [4]Margot Einstein had apparently fallen ill shortly before Einstein’s departure (see the preceding document). [5]Carl Jesinghaus (see Doc. 455). [6]Rudolf Kayser. [7]Enrique Gaviola (1900–1989) was a student of physics at the University of Berlin. [8]Hans Mühsam see the preceding document. [9]Rudolf and Fanny Einstein. Rudolf Kayser and Ilse Kayser-Einstein.