ration elsewhere, when accident led him to discover, in
the enormous trunk buried in creepers against which he had built his
cabin, a _Cinchona nitida_, the forefather of all the trees he had
stripped.

In this kind of search the caravan pursued the borders of the
river, sometimes on this side and sometimes on that, now passing the
two-headed mountain Camanti, now sighting the tufted peak of Basiri,
now crossing the torrent called the Garote. In the latter, where
the dam and hydraulic works of an old Spanish gold-hunter were still
visible in a state of ruin, the sacred golden thirst of Colonel Perez
once more attacked him. Two or three pins' heads of the insane metal
were actually unearthed by the colonel and displayed in a pie-dish;
but the business of the party was one which made even the finding of
gold insignificant, and they pursued their way.

The flanks of these mountains, however, were really of importance to
the botanical motive of the expedition. Along the side of the Camanti,
where the yellow Garote leaked downward in a rocky ravine, the
Bolivians were again successful. They brought to Marcoy specimens of
half a dozen cinchonas, for him to sketch, analyze and decorate with
Latin names. The colors of two or three of these barks promised
well, but the pearl of the collection was a specimen of the genuine
_Calisaya_, with its silver-gray envelope and leaf ribbed with
carmine. This proud discovery was a boon for science and for commerce.
It threw a new light upon the geographical locality of the most
precious species of cinchona. It was incontestably the plant, and
the Bolivians appeared amazed rather than pleased to have discovered
outside of their own country a kind of bark proper only to Bolivia,
and hardly known to overpass the northern extremity of the valley of
Apolobamba. This discovery would rehabilitate, in the European market,
the quinine-plants of Lower Peru, heretofore considered as inferior to
those of Upper Peru and Bolivia. The latter country has for some time
secured the most favorable reputation for its barks--a reputation
ably sustained by the efforts of the company De la Paz, to whom the
government has long granted a monopoly. This reputation is based on
the abundance in that country of two species, the _Cinchona calisaya_
and _Boliviana,_ the best known and most valued in the market. But
for two valuable cinchonas possessed by Bolivia, Peru can show twenty,
many of them excellent in quality,