We Now Travelled Eastward, And After A March Of Three Hours Halted Upon A Part Of The Plain, Called El Mogawa [Arabic], Where We Rested During The Mid-Day Heat.

Beyond this spot, to the distance of five hours from Cairo, we met with great quantities of petrified wood.

Large pieces of the trunks of trees, three or four feet in length, and eight or ten inches in diameter, lay about the plain, and close to the road was an entire trunk of a tree at least twenty feet in length, half buried in sand. These petrifactions are generally found in low grounds, but I saw several also on the top of the low hills of gravel and sand over which the road lies. Several travellers have expressed doubts of their being really petrified wood, and some have crossed the desert without meeting with any of them. The latter circumstance is easily accounted for; the route we were travelling is not that usually taken to Suez. I have crossed this desert repeatedly in other directions, and never saw any of the petrifactions except in this part of it. As to its really being petrified wood there cannot be any reason to doubt it, after an inspection of the substance, in which the texture and fibres of the wood are clearly distinguishable, and perfectly resemble those of the date tree. I think it not improbable, that before Nechos dug the canal between the Nile and the Red sea, the communication between Arsinoe or Clysma and Memphis, may have been carried on this way; and stations may have been established on the spots now covered by these petrified trees; the water requisite to produce and maintain vegetation might have been procured from deep wells, or from reservoirs of rain water, as is done in the equally barren desert between Djidda and Mekka. After the completion of the canal, this route was perhaps neglected, the trees, left without a

EL MOGRAH

[p.461] regular supply of water, dried up and fell, and the sands, with the winter rains and torrents, gradually effected the petrifaction. I have seen specimens of the petrified wood of date trees found in the Libyan desert, beyond the Bahr bala ma, where they were observed by Horneman in 1798, and in 1812, by M. Boutin, a French officer, who brought several of them to Cairo. They resemble precisely those which I saw on the Suez road, in colour, substance, and texture. Some of them are of silex, in others the substance seems to approach to hornblende.

We continued our route E. by S. over an uneven and somewhat hilly country covered with black petrosilex; and after a day’s march of eight hours and a quarter, we halted in a valley of little depth, called Wady Onszary [Arabic], where our camels found good pasture. Close by are some low hills, where the sands are seen in the state of formation into sand- rock, and presenting all the different gradations between their loose state and the solid stone.

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