It has been said by some, that my work on the Birds of America would not terminate until I had added to those of the United States, the numerous species of the southern portion of our continent. Allow me, reader, to refer you in refutation of this assertion to my prospectus, in which it is stated that my work will be completed in four volumes. In whatever other enterprise I may engage, rely upon it I will adhere to my original design in this; and the only change will be, that the period of publication will be shortened, and that there will be added landscapes and views, which were not promised in the prospectus.

From my original intention of publishing all the Land Birds first, I have been induced to deviate, in consequence of letters from my patrons, requesting that, after the conclusion of the second volume, the Water Birds should immediately appear. Indeed the various opinions which my subscribers occasionally express, are not a little perplexing to the "American Woodsman," ever desirous to please all, and to adhere to the method proposed at the commencement of the work. In the fourth and last volume, after the Water Birds, will be represented all that remain unpublished, or that may in the mean time be discovered, of the Land Birds. As I cannot, in the fourth volume, proportion the plates in the same manner as in the other three, the number of large drawings will be much greater in it: but the numbers will still consist of five plates, and I trust my patrons will find the same careful delineation as before, with more perfect engraving and colouring. These last numbers will of course be much more expensive to me than those in which three of the plates were small. The fourth volume will conclude with representations of the eggs of the different species.

You have perhaps observed, or if not, I may be allowed to tell you, that in the first volume of my Illustrations, in which there are 100 plates, 240 figures of birds are given; and that in the second, consisting of the same number of plates, there are 244 figures. The number of species not described by Wilson, are, in the first volume twenty-one, and in the second twenty-four.

Having had but one object in view since I became acquainted with my zealous ornithological friend, the Prince of Musignano, I have spared no time, no labour, no expense, in endeavouring to render my work as perfect as it was possible for me and my family to make it. We have all laboured at it, and every other occupation has been laid aside, that we might present in the best form the Birds of America, to the generous individuals who have placed their names on my subscription list. I shall rejoice if I have in any degree advanced the knowledge of so delightful a study as that which has occupied the greater part of my life.

I have spoken to you, kind reader, more than once of my family. Allow me to introduce them:—my eldest son Victor Gifford, the younger John Woodhouse.—Of their natural or acquired talents it does not become me to speak; but should you some day see the "Quadrupeds of America" published by their united efforts, do not forget that a pupil of David first gave them lessons in drawing, and that a member of the Bakewell family formed their youthful minds.

To England I am as much as ever indebted for support in my hazardous and most expensive undertaking, and more than ever grateful for that assistance without which my present publication might, like an uncherished plant, have died. While I reflect on the unexpected honours bestowed on a stranger through the generous indulgence of her valuable scientific associations, I cannot refrain from expressing my gratitude for the facilities which I have enjoyed under the influence which these societies are spreading over her hospitable lands, as well as in other countries. I feel equally proud and thankful when I have to say that my own dear country is affording me a support equal to that supplied by Europe.

Permit me now to say a few words respecting the persons engaged about my work. I have much pleasure in telling my patrons in Europe and America, that my engraver Mr Havell has improved greatly in the execution of the plates, and that the numbers of the "Birds of America" have appeared with a regularity seldom observed in so large a publication. For this, praise is due not only to Mr Havell, but also to his assistants Mr Blake, Mr Stewart, and Mr Edington.

I have in this, as in my preceding volume, followed the nomenclature of my much valued friend Charles Lucian Bonaparte, and this I intend to do in those which are to come, excepting always those alterations which I may deem absolutely necessary. It is my intention, at the close, to present a general table, exhibiting the geographical distribution of the different species. The order in which the plates have been published, precluding the possibility of arranging the species in a systematic manner, it has not been deemed expedient to enter into the critical remarks as to affinity and grouping, which might otherwise have been made; but at another period I may offer you my ideas on this interesting subject.

And now, reader, allow me to address my excellent friend the Critic. Would that it were in my power to express the feelings that ever since he glanced his eye over my productions, whether brought forth by the pencil or the pen, have filled my heart with the deepest gratitude;—that I could disclose to him how exhilarating have been his smiles, and how useful have been his hints in the prosecution of my enterprise! If he has found reason to bestow his commendations upon my first volume, I trust he will not find the present more defective. Indeed, I can assure him that the labour bestowed upon it by me has been much greater, and that I have exerted every effort to deserve his approbation.

JOHN J. AUDUBON.