e knowledge; a living dictionary, and a thinker and philosopher
besides. He had at least one vanity: the claim that he knew every word
in the English dictionary, and he made it good. The younger man tried
repeatedly to discover a word that Macfarlane could not define.

Perhaps Macfarlane was vain of his other mental attainments, for he never
tired of discoursing upon deep and grave matters, and his companion never
tired of listening. This Scotch philosopher did not always reflect the
conclusions of others; he had speculated deeply and strikingly on his own
account. That was a good while before Darwin and Wallace gave out--their
conclusions on the Descent of Man; yet Macfarlane was already advancing a
similar philosophy. He went even further: Life, he said, had been
developed in the course of ages from a few microscopic seed-germs--from
one, perhaps, planted by the Creator in the dawn of time, and that from
this beginning development on an ascending scale had finally produced
man. Macfarlane said that the scheme had stopped there, and failed; that
man had retrograded; that man's heart was the only bad one in the animal
kingdom: that man was the only animal capable of malice, vindictiveness,
drunkenness--almost the only animal that could endure personal
uncleanliness. He said that man's intellect was a depraving addition to
him which, in the end, placed him in a rank far below the other beasts,
though it enabled him to keep them in servitude and captivity, along with
many members of his own race.

They were long, fermenting discourses that young Samuel Clemens listened
to that winter in Macfarlane's room, and those who knew the real Mark
Twain and his philosophies will recognize that those evenings left their
impress upon him for life.

XXII

THE OLD CALL OF THE RIVER

When spring came, with budding life and quickening impulses; when the
trees in the parks began to show a hint of green, the Amazonian idea
developed afresh, and the would-be coca-hunter prepared for his
expedition. He had saved a little money--enough to take him to New
Orleans--and he decided to begin his long trip with a peaceful journey
down the Mississippi, for once, at least, to give himself up to that
indolent luxury of the majestic stream that had been so large a part of
his early dreams.

The Ohio River steamers were not the most sumptuous craft afloat, but
they were slow and hospitable. The winter had been bleak and hard.
"Spring fever"