these berries, knowing
how my wife would appreciate this acquisition; for she often lamented
that we were compelled to go to bed with the birds, as soon as the
sun set.

We forgot our fatigue, as we proceeded, in contemplation of the wonders
of nature, flowers of marvellous beauty, butterflies of more dazzling
colours than the flowers, and birds graceful in form, and brilliant in
plumage. Fritz climbed a tree, and succeeded in securing a young green
parrot, which he enveloped in his handkerchief, with the intention of
bringing it up, and teaching it to speak. And now we met with another
wonder: a number of birds who lived in a community, in nests, sheltered
by a common roof, in the formation of which they had probably laboured
jointly. This roof was composed of straw and dry sticks, plastered with
clay, which rendered it equally impenetrable to sun or rain. Pressed as
we were for time, I could not help stopping to admire this feathered
colony. This leading us to speak of natural history, as it relates to
animals who live in societies, we recalled in succession the ingenious
labours of the beavers and the marmots; the not less marvellous
constructions of the bees, the wasps, and the ants; and I mentioned
particularly those immense ant-hills of America, of which the masonry is
finished with such skill and solidity that they are sometimes used for
ovens, to which they bear a resemblance.

We had now reached some trees quite unknown to us. They were from forty
to sixty feet in height, and from the bark, which was cracked in many
places, issued small balls of a thick gum. Fritz got one off with
difficulty, it was so hardened by the sun. He wished to soften it with
his hands, but found that heat only gave it the power of extension, and
that by pulling the two extremities, and then releasing them, it
immediately resumed its first form.

Fritz ran to me, crying out, "I have found some India-rubber!"

"If that be true," said I, "you have made a most valuable discovery."

He thought I was laughing at him, for we had no drawing to rub out here.

I told him this gum might be turned to many useful purposes; among the
rest we might make excellent shoes of it. This interested him. How could
we accomplish this?

"The caoutchouc," said I, "is the milky sap which is obtained from
certain trees of the _Euphorbium_ kind, by incisions made in the bark.
It is collected in vessels, care being taken to agitate them, that the
liquid ma