The Northern Ocean beyond burst its way in through the gaps of ruin; and from that time the Zuyder Zee existed as we know it now. The years advanced, the generations of man succeeded each other; and on the shores of the new ocean there rose great and populous cities, rich in commerce, renowned in history. For centuries their prosperity lasted, before the next in this mighty series of changes ripened and revealed itself. Isolated from the rest of the world, vain of themselves and their good fortune, careless of the march of progress in the nations round them, the inhabitants of the Zuyder Zee cities sunk into the fatal torpor of a secluded people. The few members of the population who still preserved the relics of their old energy emigrated, while the mass left behind resignedly witnessed the diminution of their commerce and the decay of their institutions. As the years advanced to the nineteenth century, the population was reckoned by hundreds where it had once been numbered by thousands. Trade disappeared; whole streets were left desolate. Harbors, once filled with shipping, were destroyed by the unresisted accumulation of sand. In our own times the decay of these once flourishing cities is so completely beyond remedy, that the next great change in contemplation is the draining of the now dangerous and useless tract of water, and the profitable cultivation of the reclaimed land by generations that are still to come. Such, briefly told, is the strange story of the Zuyder Zee. As we advanced on our voyage, and left the river, I noticed the tawny hue of the sea, caused by sand-banks which color the shallow water, and which make the navigation dangerous to inexperienced seamen. We found our moorings for the night at the fishing island of Marken--a low, lost, desolate-looking place, as I saw it under the last gleams of the twilight. Here and there, the gabled cottages, perched on hillocks, rose black against the dim gray sky. Here and there, a human figure appeared at the waterside, standing, fixed in contemplation of the strange boat. And that was all I saw of the island of Marken. Lying awake in the still night, alone on a strange sea, there were moments when I found myself beginning to doubt the reality of my own position.