The Exploration of Jacob's Cavern. By C. Peabody and W.
K. Moorehead. (Norwood Press, Mass.)—Jacob's Cavern is in Missouri. In this pamphlet, published for Phillips Academy, Andover, Mass., we have an account of the human and other ancient remains found in it, the flint implements, &b., with a carefully reasoned theory as to the date and ethnology of its occupants. The general result is that these were earlier than, and of a different type from, the °sages, the first inhabitants of the region known to history. This, of course, does not carry us very far back. It means more when we are told that these occupants were probably earlier than the "Mound-builders." It would be ungracious not to recognise the academical zeal which prompts the composition and publication of these memoirs. It is not unknown in this country, but we could very well find room for more of it.