From November to March the nights are cool, and during that period
the day, in a good house or tent, is pleasant enough. From April
to October the nights are close, and often very oppressive. During
those hot months, both in the morning before the sea-breeze springs
up and in the evening when it has died away, all animal creation
falls into a torpid state. The perfect calm that then reigns is
fearful in its stillness and painful in its effects.

From May to August sand-storms frequently occur. They begin usually
at four P.M. (though occasionally they appear in the morning), and
last from a few minutes only to a couple of hours. Long before the
storm is felt, the horizon towards the N.N.W. is quite dark; a black
cloud extends from the sea to the mountain range, and as it advances
the sun itself is obscured. A few minutes of dead calm, and then
suddenly the dark column approaches; all seems to disappear before
it, and the roar of the terrible hurricane of wind and sand now
coursing over the land is almost sublime in its horrors. Coming
after the moist sea breeze, the hot and dry wind appears quite cool,
though the thermometer rises to 110 or 115 degrees. After the storm
a gentle land breeze follows, and often lasts all night. The amount
of sand carried by the wind in these storms can be imagined by the
mere mention of the fact that we could not discern, at a short
distance from us, such a large object as a tent.

It seldom rains; occasionally there are a few showers in August and
November.

As far as Europeans are concerned, climates like the one we have
just described cannot be considered as unhealthy; they debilitate
and weaken the system, and predispose to tropical diseases, but