German article in Die Gartenlaube, 1889, no. 13
German article in Die Gartenlaube, 1886, no. 45-46
German article in Die Gartenlaube, 1891, no. 42 und 43
German article in Die Gartenlaube, 1889, no. 24
German article in Die Gartenlaube, 1888, no. 22, 23
German article in Die Gartenlaube, 1887, no. 50