gricultural property is ascertained by a large stone laid at each
corner of a plantation of corn, a direct line is drawn from stone
321 to stone at the season of reaping; it has, perhaps, never been
known, that these partitions have been removed for the purpose of
encroachment; a mutual confidence, and a point of honour renders
this mode of discriminating the respective property of individuals
adequate to every purpose of hedge or ditch.

_Mines_.

The mountains that separate the province of Suse from that of
Draha, abound in iron, copper, and lead. Ketiwa, a district on the
declivity of Atlas, east of Terodant, contains also mines of lead
and brimstone; and saltpetre also, of a superior quality, abounds
in the neighbourhood of Terodant. In the same mountains, about
fifty or sixty miles south-west of Terodant, there are mines of
iron of a very malleable quality, equal to that of Biscay in Spain,
from which the people of Tagrasert manufacture gun-barrels, equal
to those made in Europe. At Elala in Suse, in the same ridge of
mountains, are several rich mines of copper, some of which are
impregnated with gold: they have also a rich silver mine, the metal
of which latter is cast in round lumps, weighing two or three
ounces each piece. I have bought of this silver at Santa Cruz, and
have paid Spanish dollars for it, weight for weight; it is very
pure. Mines of antimony and lead ore are also found in Suse,
332 impregnated with gold, some specimens of which I sent to England to
be analyzed; but being informed that it yielded gold sufficient
only to pay the expenses of purifying, I gave no farther attention
to it, although I have had reason to think, since then, that an
importation of the ore would amply pay the importer.

_Nyctalopia, Hemeralopia, or Night-blindness, called by the Arabs
Butelleese; and its Remedy_.

During my residence at Santa Cruz, I had a cousin with me who was
afflicted with this disorder. When the sun sat his blindness came
on, and continued till the rising sun. This youth was so afflicted,
during a month, with this disorder, that he could scarcely see his
way with a candle in his hand, so that it was quite painful to see
him groping about. An Arab of the Woled Abbusebah Kabyl, who retain
much of the science and art of their ancestor