Had Michael's friends the old mythologists ever known anything about it, they would doubtless have made it the entrance to the infernal regions.

On the whole surface of our Earth, there is no mountain even remotely resembling it.

It is a perfect type of the lunar crater.

Like most of them, it shows that the peculiar formation of the Moon's surface is due, first, to the cooling of the lunar crust; secondly, to the cracking from internal pressure; and, thirdly, to the violent volcanic action in consequence.

This must have been of a far fiercer nature than it has ever been with us.