the summit of these lofty cliffs of slaty and siliceous sandstone, where, from an elevation of about 600 feet, I obtained a panorama view of the surrounding country, {110} checquered with low mountains running in chains from the north of west to the south of east. The meanders of the river appeared partly hid in the pervading forests of its alluvial lands, still fertile and expansive. To the west, the lofty, conic, and broken hill called the Mamelle now appeared nearly double the elevation of that on which I stood, probably more than 1000 feet in height. Two miles above, it presented the appearance of a vast pyramid, hiding its summit in the clouds. In this direction opened an extensive alluvial valley, probably once the bed of the river, which from hence makes a general curve of about 20 miles towards the north. These mountains appear to be connected with the Mazern chain of Darby, as they continue from hence towards the sources of the Pottoe of Arkansa, and the Little river, and Kiamesha of Red river.[131]
Amidst these wild and romantic cliffs, and on the ledges of the rocks, where, moistened by springs, grew a cruciferous plant, very closely allied, if not absolutely the same, with the Brassica napus or the Rape-seed of Europe, and beyond all question indigenous.
24th.] After taking a second sketch of the Mamelle mountain, from a different point of view, I proceeded to join the boat, and crossed a poor and rocky Pine hill. Here the sandstone is scarcely slaty, and, as usual, more or less ferruginous. Crossing the bayou Palame (or rather rivulet), I joined the boat at Mr. Gozy's, in whose
