Page:Sketches by Mark Twain.djvu/81

Rh 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 labourers 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.

The Tumble-Bug, overhearing this discussion, said he