The ascendancy over men's minds of the ruins of the stupendous past, the past of history, legend and myth, at once factual and fantastic, stretching back and back into ages that can but be surmised, is half-mystical in basis. The intoxication, at once so heady and so devout, is not the romantic melancholy engendered by broken towers and mouldered stones; it is the soaring of the imagination into the high empyrean where huge episodes are tangled with myths and dreams; it is the stunning impact of world history on its amazed heirs.