INDIAN ROCK, on Smoky Hill River, Kansas--From a Photograph.] That place we found to consist of two buildings, each serving the double purpose of house and store, the track running between them. Two sandstone blocks, each weighing several hundred pounds, lay in front of one of the stores, and there, sure enough, impressed clearly and deeply upon their surface were the tracks of human feet. They had been discovered by a Mr. J. B. Hamilton on the adjacent bluffs. There was something weird and startling in this voice from those long-forgotten ages--ages no less remote than when the ridge we were standing upon was a portion of a lake shore. The man who trod those sands, the professor informed us, perished from the face of the earth countless ages before the oldest mummy was laid away in the caves of Egypt; and yet people looked at the shriveled Egyptian, and thought that they were holding converse with one who lived close upon the time of the oldest inhabitant. They wrested secrets from his tomb, and called them very ancient. And now this dweller beside the great lakes had lifted his feet out of the sand to kick the mummy from his pedestal of honor in the museum, as but a being of yesterday, in comparison with himself. This discovery was soon afterward extensively noticed in the newspapers, and the specimens are now in the collection made by our party at Topeka. It is but fair to say that a difference of opinion exists in regard to these imprints. Many scientific men, among whom is Professor Cope, affirm that they must be the work of Indians long ago, as the age of the rock puts it beyond the era of man, while others attribute them to some lower order of animal, with a foot resembling the human one. For my own part, after careful examination, I accept our professor's theory, that the imprints are those of human feet. The surface of the stone has been decided by experts to be bent down, not chiseled out. Science not long ago ridiculed the primitive man, which it now accepts. It is not strange, therefore, that science should protest against its oldest inhabitant stepping out from ages in which it had hitherto forbidden him existence. We also found on the rocks fine impressions of leaves, resembling those of the magnolia, and gathered a bushel of petrified walnuts and butternuts. There were no other indications whatever of trees, the whole country, as far as we could see, being a desolate prairie.