Page:Travels to Discover the Source of the Nile - In the Years 1768, 1769, 1770, 1771, 1772, and 1773 volume 1.djvu/283

Rh half past ten, we passed a mountain of green and red marble, and at twelve we entered a plain called Hamra, where we first observed the sand red, with a purple cast, of the colour of porphyry, and this is the signification of Hamra, the name of the valley. I dismounted here, to examine of what the rocks were composed; and found, with the greatest pleasure, that here began the quarries of porphyry, without the mixture of any other stone; but it was imperfect, brittle, and soft. I had not been engaged in this pursuit an hour, before we were alarmed with a report that the Atouni had attacked the rear of the caravan; we were at the head of it. The Turks and my servants were all drawn together, at the foot of the mountain, and posted as advantageously as possible. But it soon appeared that they were some thieves only, who had attempted to steal some loads of corn from camels that were weak, or fallen lame, perhaps in intelligence with those of our own caravans.

the rest of the afternoon, we saw mountains of a perfectly purple colour, all of them porphyry; nor has Ptolemy † much erred in the position of them. About four o'clock, we pitched our tent at a place called Main el Mafarek. The colour of the valley El Hamra continued to this station; and it was very singular to observe, that the ants, or pismires, the only living creatures I had yet observed, were all of a beautiful red colour like the sand.

The 20th, at six oclock in the morning, we left Main el