Now it must be remembered that the bones we have been speaking of, are found deeply imbedded in the earth, and that no animals of the kind now exist in any part of the world. Beside those we have mentioned, there were many others, as tortoises, elephants, tigers, bears, and rhinoceroses, but of different kinds from those which now exist. It appears that there were elephants of many sizes, and some of them had woolly hair. The skeleton of one of the larger kinds, was found in Siberia, some years since, partly imbedded in ice, as I have told you in a former number. The subject of which we are treating increases in interest as we pursue it. Not only does it appear, that, long before man was created, and before the present order of things existed on the earth, strange animals, now unknown, inhabited it, but that they were exceedingly numerous. In certain caves in England, immense quantities of the bones of hyenas, bears, and foxes are found; and the same is the fact in relation to certain caves in Germany. Along the northern shores of Asia, the traces of elephants and rhinoceroses are so abundant as to show that these regions, now so cold and desolate, were once inhabited by thousands of quadrupeds of the largest kinds. In certain parts of Europe, the hills and valleys appear to be almost composed of the bones of extinct animals; and in all parts of the world, ridges, hills and mountains, are made up of the shells of marine animals, of which no living specimen now dwells on the earth! Nor is this the only marvel that is revealed by the discoveries of modern geology. Whole tribes of birds and insects, whole races of trees and plants, have existed, and nothing is left of their story save the traces to be found in the soil, or the images depicted in the layers of slate. They all existed before man was created, and thousands of years have rolled over the secret, no one suspecting the wonderful truth. Nor does the train of curiosities end here. It appears that the climates of the earth must have been different in those ancient and mysterious days from what they are at present: for in England, ferns, now small plants, grew to the size of trees, and vegetables flourished there of races similar to those which now grow only in the hot regions of the tropics. As before stated, the northern shores of Siberia, in Asia, at present as cold and desolate as Lapland, and affording sustenance only to the reindeer that feeds on lichens, was once inhabited by thousands and tens of thousands of elephants, and other creatures, which now only dwell in the regions of perpetual summer.