For it is no easy or cheap task to build a sure path through such a swamp.

From a distance, forests of mangrove seemed to be massed on rising ground, and to group themselves about the sides and the crests of knolls.

As a matter of fact, the presence of a mangrove forest is a sign of the very lowest ground, ground covered for the most part by salt tidewater.

The lowest pine barren is higher than the loftiest mangrove wilderness.
Gavin Brice's aspect of lassitude dropped from him like an outworn garment.

For hours--except during his brief encounter with the beach comber--he had been steadily on the move, and had covered a good bit of ground.