long journey, they have not
strength to contend against the force of the current.

The village of Oroya, about a quarter of a mile from the bridge, is
built on a declivity, and according to Maclean's calculation is 12,010
feet above the level of the sea. It contains fifty-one miserable huts,
which are the habitations of about two hundred Indians. From Oroya
several roads branch off into the different mountain districts. The most
frequented is that over the level height of Cachi-Cachi to Jauja. Along
this road there are extensive tracts of ground covered with calcareous
petrifactions. Another road leading to Tarma passes by the ancient Inca
fortress Huichay. A third, and much frequented road is that by way of
Huaypacha, and from thence to Junin and Cerro de Pasco.

FOOTNOTES:

[Footnote 52: All these calculations are by English feet.]

[Footnote 53: Jardine and Selby's Annals of Natural History.]

[Footnote 54: Nivelacion barometrica desde el Callao hasta Pasco, por el
camino de Obrajillo, y desde el mismo lugar hasta la capital por via de
Tarma, hecha y calculada por Mariano Eduardo Rivero y Usturitz in
Memorial de Ciencias naturales, &c.]

[Footnote 55: Darwin's Journal, p. 350]

[Footnote 56: The Spaniards term this plant _Una de gato_ (Cat's-claw),
the stalk being furnished with hooked thorns resembling claws.]

[Footnote 57: For further information relative to this disease, see my
communication to Wunderlich and Roser's "_Archiv fuer Physiologische
Heilkunde_."]

[Footnote 58: See page 153.]

[Footnote 59: By a nail is lost a shoe, by a shoe a horse, and by a
horse a rider.]

[Footnote 60: According to Maclean, the elevation of Matucanas is 8026
feet above the level of the sea. I presume that this calculation
refers to the village itself, which is situated about the eighth of a
league from the tambo, and lies much lower.]

[Footnote 61: According to Maclean's calculation, the Tambo de Viso is
9072 feet above the sea.]

[Footnote 62: Maclean states the elevation to be 10,984 feet above
the sea. Rivero makes it 9570, and Gay 10,408 feet. Gay's is the only
measurement which in any manner corresponds with mine and Maclean's.
In general Gay's calculations are between 600 and 800 feet higher
than ours.]

[Footnote 63: Maclean makes it 15,543 feet; Gay, 15,924 feet; and Rivero,
only 14,608 feet above the level of the sea.]

[Footnote 64: The _Puenteros_ (Bridge Guides) are Indians who assist
travellers