of the
crystallisation of quartz referred to poles, at p. 8 of Cloizaux's
'Manuel de Mineralogie': that they may know what work is; and what the
subject is.

With a view to more careful examination of the nascent states of silica,
I have made no allusion in this volume to the influence of mere
segregation, as connected with the crystalline power. It has only been
recently, during the study of the breccias alluded to in page 113, that
I have fully seen the extent to which this singular force often modifies
rocks in which at first its influence might hardly have been suspected;
many apparent conglomerates being in reality formed chiefly by
segregation, combined with mysterious brokenly-zoned structures, like
those of some malachites. I hope some day to know more of these and
several other mineral phenomena (especially of those connected with the
relative sizes of crystals), which otherwise I should have endeavoured
to describe in this volume.

NOTE V.

Page 102.

_'St. Barbara.'_

I would have given the legends of St. Barbara, and St. Thomas, if I had
thought it always well for young readers to have everything at once told
them which they may wish to know. They will remember the stories better
after taking some trouble to find them: and the text is intelligible
enough as it stands. The idea of St. Barbara, as there given is founded
partly on her legend in Peter de Natalibus, partly on the beautiful
photograph of Van Eyck's picture of her at Antwerp: which was some time
since published at Lille.

NOTE VI.

Page 137.

_'King of the Valley of Diamonds.'_

Isabel interrupted the Lecturer here, and was briefly bid to hold her
tongue; which gave rise to some talk, apart, afterwards, between L. and
Sibyl, of which a word or two may be perhaps advisably set down.

SIBYL. We shall spoil Isabel, certainly, if we don't mind: I was glad
you stopped her, and yet sorry; for she wanted so much to ask about the
Valley of Diamonds again, and she has worked so hard at it, and made it
nearly all out by herself. She recollected Elisha's throwing in the
meal, which nobody else did.

L. But what did she want to ask?

SIBYL. About the mulberry trees and the serpents; we are all stopped by
that. Won't you tell us what it means?

L. Now, Sibyl, I am sure you, who never explained yourself, should be
the last to expect others to do so. I hate explaining myself.

SIBYL. And yet how often you complain of other people for not s