I am afraid, also, that disappointment may be felt at not finding plates of more complete subject illustrating these chapters on mountain beauty. But the analysis into which I had to enter required the dissection of drawings, rather than their complete presentation; while, also, on the scale of any readable page, no effective presentation of large drawings could be given. Even my vignette, the frontispiece to the third volume, is partly spoiled by having too little white paper about it; and the fiftieth plate, from Turner's Goldau, necessarily omits, owing to its reduction, half the refinements of the foreground. It is quite waste of time and cost to reduce Turner's drawings at all; and I therefore consider these volumes only as _Guides_ to them, hoping hereafter to illustrate some of the best on their own scale. Several of the plates appear, in their present position, nearly unnecessary; +14+ and +15+, for instance, in Vol. III. These are illustrations of the chapters on the Firmament in the fifth volume; but I should have had the plates disproportionately crowded at last, if I had put all that it needed in that volume; and as these two bear somewhat on various matters spoken of in the third, I placed them where they are first alluded to. The frontispiece has chief reference to the same chapters; but seemed, in its three divisions, properly introductory to our whole subject. It is a simple sketch from nature, taken at sunset from the hills near Como, some two miles up the eastern side of the lake and about a thousand feet above it, looking towards Lugano. The sky is a little too heavy for the advantage of the landscape below; but I am not answerable for the sky. It was _there_.[A] In the multitudinous letterings and references of this volume there may possibly be one or two awkward errata; but not so many as to make it necessary to delay the volume while I look it over again in search of them. The reader will perhaps be kind enough to note at once that in page 182, at the first line of the text, the words "general truth" refer to the angle-measurements, not to the diagrams; which latter are given merely for reference, and might cause some embarrassment if the statement of measured accuracy were supposed to refer to them. One or two graver misapprehensions I had it in my mind to warn the reader against; but on the whole, as I have honestly tried to make the book intelligible, I believe it will be found intelligible by any one who thinks it worth a careful reading; and every day convinces me more and more that no warnings can preserve from misunderstanding those who have no desire to understand. Denmark Hill, March, 1856. FOOTNOTES