because the gneiss of which it is composed is
softer in grain than that of the Bouchard, and remains so even to
the very top of the peak, _a_, in Fig. 61, where I found it mixed
with a yellowish and somewhat sandy quartz rock, and generally much
less protogenic than is usual at such elevations on other parts of
the chain.

[76] It is worth while noting here, in comparing Fig. 66 and Fig.
68, how entirely our judgment of some kinds of art depends upon
knowledge, not on feeling. Any person unacquainted with hills would
think Claude's right and Titian's ridiculous: but, after inquiring a
little farther into the matter, we find Titian's a careless and
intense expression of true knowledge, and Claude's a slow and
plausible expression of total ignorance.

It will be observed that Fig. 69 is one of the second order of
crests, _d_, Fig. 48. The next instance given is of the first order
of crests, _c_, in the same figure

[77] This etching, like that of the Bolton rocks, is prepared for
future mezzo-tint, and looks harsh in its present state; but will
mark all the more clearly several points of structure in question.
The diamond-shaped rock, however, (M, in the reference figure,) is
not so conspicuous here as it will be when the plate is finished,
being relieved in light from the mass behind, as also the faint
distant crests in dark from the sky.

[78] An anecdote is related, more to our present purpose, and better
authenticated, inasmuch as the name of the artist to whom Turner was
speaking at the time is commonly stated, though I do not give it
here, not having asked his permission. The story runs that this
artist (one of our leading landscape painters) was complaining to
Turner that, after going to Domo d'Ossola, to find the site of a
particular view which had struck him several years before, he had
entirely failed in doing so; "it looked different when he went back
again." "What," replied Turner, "do you not know yet, at your age,
that you ought to _paint_ your _impressions_?"

[79] So, in the exact length or shape of shadows in general, he will
often be found quite inaccurate; because the irregularity caused in
shadows by the shape of what they fall _on_, as well as what they
fall from, renders the law of connection untraceable by the eye or
the instinct. The chief _visible_ thing