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E.A. Martel 1859-1938 „ the father of modern speleology “. Gaping Gill, Yorkshire 1895. E.A.Martel Salt Cave 1912. Martel Avenue. Hovey´s cathedrals. Gerta´s Grotto. Elisabeth Dome. 1911. 1920. 1931. 1941. Bismarck. Moltke. Wulf-Ekkehard Lucke, Landesarchiv Berlin.
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E.A. Martel 1859-1938 „the father of modern speleology“
Gaping Gill, Yorkshire 1895
E.A.Martel Salt Cave 1912
Martel Avenue
1911 1920
1931 1941
Bismarck Moltke
Violet City Echo River
Gerta´s grotto Neptune´s cups
July 1908 Gerta Luyken
Max Kämper * december 16, 1879 + november 10, 1916