In the earlier times some bold and adventurous men did indeed succeed in getting a few jewels, but since then the marsh has become more dangerous, and its pestilent character, indeed, increases year by year, as the stagnant water penetrates deeper.
So that now for very many years no such attempts have been made.
The extent of these foul swamps is not known with certainty, but it is generally believed that they are, at the widest, twenty miles across, and that they reach in a winding line for nearly forty.

But the outside parts are much less fatal; it is only the interior which is avoided.
Towards the Lake the sand thrown up by the waves has long since formed a partial barrier between the sweet water and the stagnant, rising up to within a few feet of the surface.

This barrier is overgrown with flags and reeds, where it is shallow.

Here it is possible to sail along the sweet water within an arrow-shot of the swamp.

Nor, indeed, would the stagnant mingle with the sweet, as is evident at other parts of the swamp, where streams flow side by side with the dark or reddish water; and there are pools, upon one side of which the deer drink, while the other is not frequented even by rats.
The common people aver that demons reside in these swamps; and, indeed, at night fiery shapes are seen, which, to the ignorant, are sufficient confirmation of such tales.