This was the boundary of his travels along the coast, from which he now turned towards the interior, and arrived upon the shores of the Lake of Marko, the Palus Tritonis of the ancients. This lake is about sixty miles in length, and in some places about eighteen in breadth; but it is not one unbroken sheet of water, being interspersed with numerous islands, one of which, though uninhabitable, is large, and covered with date trees. The inhabitants, who have a tradition for every thing, say that the Egyptians, in one of their expeditions into this country, encamped some time upon this island, and scattering about the stones of the dates which they had eaten, thus sowed the palm groves, which at present abound there; and hence, perhaps, the lake itself acquired the name of the “Plains of Pharaoh.” To direct the marches of the caravans across this shallow lake, a number of trunks of palm-trees are fixed up at certain distances, without which travelling would be extremely difficult and dangerous, as the opposite shores are nearly as level as the sea, and even the date trees which grow upon them are too low to be discovered at more than sixteen miles distance. At Tozer, on the western bank, a great traffic in dates is carried on with the merchants of the interior, who bring slaves from the banks of the Niger to be exchanged for fruit. Proceeding to the west from the Lake of Marko, our traveller next traversed a barren and dreary waste, the haunt of robbers and murderers; and as he passed along he saw upon the ground the blood of a Turkish gentleman, who, he afterward learned, had been murdered two days before. Immediately after he had left this ominous spot, five of the assassins, mounted upon black horses, and closely muffled in their burnooses, or loose cloaks, suddenly made their appearance; but observing that his companions were numerous and well armed, they met them peaceably, and gave them the _salaam_. Continuing his journey westward, without meeting with any further adventures, he returned to Algiers.