Read it through once

In that cave also are found human bones, crusted with a very thick, stony coating, and wise men have ventured to say that those men not only lived before the flood, but as much as ten thousand years before it. It may be true--it looks reasonable enough--but as long as those parties can't vote anymore, the matter can be of no great public interest. In this cave likewise are found skeletons and fossils of animals that exist in every part of Africa, yet within memory and tradition have never existed in any portion of Spain save this lone peak of Gibraltar! So the theory is that the channel between Gibraltar and Africa was once dry land, and that the low, neutral neck between Gibraltar and the Spanish hills behind it was once ocean, and of course that these African animals, being over at Gibraltar (after rock, perhaps--there is plenty there), got closed out when the great change occurred. The hills in Africa, across the channel, are full of apes, and there are now and always have been apes on the rock of Gibraltar--but not elsewhere in Spain! The subject is an interesting one.