But let us not outrun our narrative. After close examination of the fronts of the caverns, and much thinking and exchanging of theories, the scientists determined the nature of these singular formations. They said that each belonged mainly to the Old Red Sandstone period; that the cavern fronts rose in innumerable and wonderfully regular strata high in the air, each stratum about five frog-spans thick, and that in the present discovery lay an overpowering refutation of all received geology; for between every two layers of Old Red Sandstone reposed a thin layer of decomposed limestone; so instead of there having been but one Old Red Sandstone period there had certainly been not less than a hundred and seventy-five! And by the same token it was plain that there had also been a hundred and seventy-five floodings of the earth and depositings of limestone strata! The unavoidable deduction from which pair of facts was the overwhelming truth that the world, instead of being only two hundred thousand years old, was older by millions upon millions of years! And there was another curious thing: every stratum of Old Red Sandstone was pierced and divided at mathematically regular intervals by vertical strata of limestone. Up-shootings of igneous rock through fractures in water formations were common; but here was the first instance where water-formed rock had been so projected. It was a great and noble discovery, and its value to science was considered to be inestimable.
A critical examination of some of the lower strata demonstrated the presence of fossil ants and tumble-bugs (the latter accompanied by their peculiar goods), and with high gratification the fact was enrolled upon the scientific record; for this was proof that these vulgar laborers belonged to the first and lowest orders of created beings, though at the same time there was something repulsive in the reflection that the perfect and exquisite creature of the modern uppermost order owed its origin to such ignominious beings through the mysterious law of Development of Species.