120 JOURNEY FROM should say that it commences at Mesurata, and extends southward along the coast as far as GiralF; occupying altogether a space of 101 miles by 15, and narrowing towards its southern termination. A small part of the marsh only was covered with water when we crossed it ; but from the alternate laminae of salt and alluvial deposite as well as from the numerous small shells principally of the trochus kind, which cover its surface, it is evident that the sea at times wholly inundates it. Our guides were always desirous that we should not deviate from the track, and were constantly representing to us the danger there was of sinking, with all the usual hyperbole of Arab description. As we suspected, however, that they only made difficulties in order to save themselves the trouble of attending us in our excursions, we paid but little attention to their observations of this nature ; and continued to cross the marsh, whenever our duties rendered it necessary that we should examine either the coast or the country beyond it, taking no other precautions than those of keeping in such places as appeared to ourselves to offer the firmest footing.

The crusted surface occasionally gave way under our horses’ feet, and discovered hollow spaces of various depths underneath, at the bottom of which appeared water : but as none of our party ever sank in very deeply, we concluded that these hollows were too trifling to be dangerous, and continued to cross the marsh wherever it seemed practicable, till experience at length convinced us that a portion of truth was mixed up with the exaggerated accounts of our guides, and induced us to use more precaution.

Many insulated spots, both of earth and of sand, are conspicuous