Some discussion has arisen in respect to the geological time of these bones. There was no stalagmite overlying the mud or loam in which the skeleton was found, and no other bones met with save the tusk of a bear. There is no certain data given whereby its position may be known. Professor Huxley declares that the bones "indicate a very high antiquity."[34] Buchner is very positive in his statement, and declares that "the loam-deposit which partly fills the caves of the Neanderthal and the clefts and fissures of its limestone mountains, and in which both the Neanderthal bones and the fossil bones and teeth of animals were imbedded, is exactly the same that, in the caverns of the Neanderthal, covers the whole limestone mountain with a deposit from ten to twelve feet in thickness, and the diluvial origin of which is unmistakable."[35] Dr. Fuhlrott says, "The position and general arrangement of the locality in which they were found, place it, in my judgment, beyond doubt that the bones belong to the diluvium, and therefore to primitive times, _i. e._ they come down to us from a period of the past when our native country was still inhabited by various kinds of animals, especially mammoths and cave-bears, which have long since disappeared out of the series of living creatures."[36] The diluvial or glacial origin of the Neanderthal skull is still further confirmed by the discoveries made, in the summer of 1865, in the Teufelskammer. This cavern is situated one hundred and thirty paces from the one in which the human bones were found, and on the same side of the river.. In the loam-deposit of this cave were found numerous fossil bones and teeth of the rhinoceros, cave-bear, cave-hyena, and other extinct animals. "A great part of these bones, especially those of the cave-bears, agree in color, weight, density, and the preservation of their microscopic structure, with the human bones found in the Feldhofner Cave (in which the Neanderthal man was found), and both are covered with the same _dendrites_, or tree-like markings."[37]