he
following are their distances by the watch:--At ten o'clock we came
to a narrow, rocky chasm, at the extremity of which the water falls
several feet below into a large basin; and here we unloaded the boats,
which hitherto had, under skilful management, wound their way, like
well-trained horses, between all the impediments in the bed of the
river and over all the cascades and waves, almost without taking any
water; only two men remaining in each boat, who, loudly cheering,
shot downwards; in doing which the boats were filled to the brim.

[Jasper and Coal.] Opposite this waterfall a bank of rubbish had been
formed by the alluvium, in which, besides fragments of the subjacent
rock, were found well-rounded pieces of jasper and porphyry, as well
as some bits of coal containing several pyrites, which had probably
been brought during the rain from higher up the river. Its origin was
unknown to the sailors. From fifty-six minutes past eleven to twelve
o'clock there was an uninterrupted succession of rapids, which were
passed with the greatest dexterity, without taking in water. Somewhat
lower down, at about three minutes past twelve, we took in so much
water that we were compelled to land and bale it out. At about fifteen
minutes past twelve, we proceeded onwards, the river now being on
the average sixty feet broad. On the edge of the wood some slender
palms, hardly ten feet high, were remarkable by their frequency,
and many phalaenopses by their display of blossoms, which is of
rare occurrence. Neither birds nor apes, nor serpents were observed;
but large pythons, as thick as one's leg are said to be not unfrequent.

[Big pythons.] About thirty-six minutes past twelve we reached one
of the most difficult places--a succession of waves, with many rocks
projecting out of the water, between which the boats, now in full
career, and with rapid evolutions, glided successfully. The adventure
was accomplished with equal skill by the two crews, who exerted their
powers to the utmost. At seventeen minutes past one we arrived at
[Dini portage.] Dini, the most considerable waterfall in the whole
distance; and here we had to take the boats out of the water; and,
availing ourselves of the lianas which hung down from the lofty forest
trees like ropes, we dragged them over the rocks. At twenty-one minutes
past two we resumed our journey; and from twenty-two minutes past to
half past eight we descended an irregular stair composed of severa