But here, again, it seems we are not certain when this depression commenced.33 In a previous chapter we have gone over the Glacial Age, and have seen when, according to Mr. Croll’s theory, it commenced. This was probably not far from the close of the Pliocene Age. We might as well leave the matter here. There are so many elements of uncertainty that it is doubtful if we will ever be able to assign satisfactory dates to the epoch.34 In bringing to a conclusion this somewhat extended notice of early man in California we have to admit that much of it is speculative; still it is an endeavor to explain known facts. The main statement is that man lived in California in the Pliocene Age, in the Neolithic stage of culture. Whether the arguments adduced in support of this statement are sufficient to prove its accuracy must be left to the mature judgment of the scientific world. There is no question but that the climate and geography, the fauna and the flora, were then greatly different from those of the present. Starting with these known facts, so strange and fascinating, it need occasion no surprise, if the pen of the enthusiastic explorer depict a scene wherein facts and fancy are united. In this case truth is certainly stranger than fiction, and when, in imagination, we see the great Pacific archipelago emerge from the waves, and, in place of the long swell of the ocean, we picture the pleasing scenes of tropic lands, the strange floral growth of a past geological age, the animal forms which have since disappeared, with man already well advanced in culture: when we recall all this, and picture forth the surprising changes which then took place, the slowly subsiding land, the encroaching waters, and the resultant watery waste, with here and there a coral-girt island, the great volcanic uplift on the main-land, the flaming rivers of molten lava, which come pouring forth, followed by the night of cold, ice, and snow: when we consider these, and the great lapse of time necessary for their accomplishment, how powerless are mere words to set forth the grandeur and the resistless sweep of nature’s laws, and to paint the insignificance and trifling nature of man and his works!