usually in the afternoon of a close hot day, after the north wind had
been blowing persistently for days with a breath as from a furnace. At
last the hateful wind would drop and a strange gloom that was not from
any cloud would cover the sky; and by and by a cloud would rise, a
dull dark cloud as of a mountain becoming visible on the plain at an
enormous distance. In a little while it would cover half the sky, and
there would be thunder and lightning and a torrent of rain, and at the
same moment the wind would strike and roar in the bent-down trees and
shake the house. And in an hour or two it would perhaps be all over,
and next morning the detested thistles would be gone, or at all events
levelled to the ground.

After such a storm the sense of relief to the horseman, now able to
mount and gallop forth in any direction over the wide plain and see
the earth once more spread out for miles before him, was like that of
a prisoner released from his cell, or of the sick man, when he at
length repairs his vigour lost and breathes and walks again.

To this day it gives me a thrill, or perhaps it would be safer to say
the ghost of a vanished thrill, when I remember the relief it was in
my case, albeit I was never so tied to a horse, so parasitical, as the
gaucho, after one of these great thistle-levelling _pampero_ winds. It
was a rare pleasure to ride out and gallop my horse over wide brown
stretches of level land, to hear his hard hoofs crushing the hollow
desiccated stalks covering the earth in millions like the bones of a
countless host of perished foes. It was a queer kind of joy, a mixed
feeling with a dash of gratified revenge to give it a sharp savour.

After all this abuse of the giant thistle, the _Cardo asnal_ of the
natives and _Carduus mariana_ of the botanists, it may sound odd to