urally KNOW one from the other, but you never will be able to explain
why or how you know them apart'

It turned out to be true. The face of the water, in time, became a
wonderful book--a book that was a dead language to the uneducated
passenger, but which told its mind to me without reserve, delivering its
most cherished secrets as clearly as if it uttered them with a voice.
And it was not a book to be read once and thrown aside, for it had a new
story to tell every day. Throughout the long twelve hundred miles there
was never a page that was void of interest, never one that you could
leave unread without loss, never one that you would want to skip,
thinking you could find higher enjoyment in some other thing. There
never was so wonderful a book written by man; never one whose interest
was so absorbing, so unflagging, so sparkingly renewed with every
reperusal. The passenger who could not read it was charmed with a peculiar
sort of faint dimple on its surface (on the rare occasions when he did
not overlook it altogether); but to the pilot that was an ITALICIZED
passage; indeed, it was more than that, it was a legend of the largest
capitals, with a string of shouting exclamation points at the end of it;
for it meant that a wreck or a rock was buried there that could tear the
life out of the strongest vessel that ever floated. It is the faintest
and simplest expression the water ever makes, and the most hideous to a
pilot's eye. In truth, the passenger who could not read this book saw
nothing but all manner of pretty pictures in it painted by the sun and
shaded by the clouds, whereas to the trained eye these were not pictures
at all, but the grimmest and most dead-earnest of reading-matter.

Now when I had mastered the language of this water and had come to know
every trifling feature that bordered the great river as familiarly as I
knew the letters of the alphabet, I had made a valuable acquisition. But
I had lost something, too. I had lost something which could never be
restored to me while I lived. All the grace, the beauty, the poetry had
gone out of the majestic river! I still keep in mind a certain
wonderful sunset which I witnessed when steamboating was new to me. A
broad expanse of the river was turned to blood; in the middle distance
the red hue brightened into gold, through which a solitary log came
floating, black and conspicuous; in one place a long, slanting mark lay
sparkling upon the water; in another