not to be had,
the copies which are in course of publication by Mr. Lupton (4 Keppel
Street, Russell Square) are good and serviceable; but no others are of
any use.--[Note of 1857.]

I have placed in the hands of Mr. Ward (Working Men's College) some
photographs from the etchings made by Turner for the Liber; the original
etchings being now unobtainable, except by fortunate accident. I have
selected the subjects carefully from my own collection of the etchings;
and though some of the more subtle qualities of line are lost in the
photographs, the student will find these proofs the best lessons in
pen-drawing accessible to him.--[Note of 1859]

II.

THINGS TO BE STUDIED.

255. The worst danger by far, to which a solitary student is exposed, is
that of liking things that he should not. It is not so much his
difficulties, as his tastes, which he must set himself to conquer: and
although, under the guidance of a master, many works of art may be made
instructive, which are only of partial excellence (the good and bad of
them being duly distinguished), his safeguard, as long as he studies
alone, will be in allowing himself to possess only things, in their way,
so free from faults, that nothing he copies in them can seriously
mislead him, and to contemplate only those works of art which he knows
to be either perfect or noble in their errors. I will therefore set
down, in clear order, the names of the masters whom you may safely
admire, and a few of the books which you may safely possess. In these
days of cheap illustration, the danger is always rather of your
possessing too much than too little. It may admit of some question, how
far the looking at bad art may set off and illustrate the characters of
the good; but, on the whole, I believe it is best to live always on
quite wholesome food, and that our enjoyment of it will never be made
more acute by feeding on ashes; though it may be well sometimes to taste
the ashes, in order to know the bitterness of them. Of course the works
of the great masters can only be serviceable to the student after he has
made considerable progress himself. It only wastes the time and dulls
the feelings of young persons, to drag them through picture galleries;
at least, unless they themselves wish to look at particular pictures.
Generally, young people only care to enter a picture gallery when there
is a chance of getting leave to run a race to the other end of it; and
they had better do that