Three years have nearly elapsed since I had the pleasure of presenting you with the third volume of my “Ornithological Biography,” and about twelve since the first fasciculus of my “Illustrations of the Birds of America” was submitted to your inspection. This work, comprising four hundred and thirty-five plates, and one thousand and sixty-five figures, was finished on the 20th of June 1838, without the continuity of its execution having been broken for a single day, and the numbers having been delivered with exemplary regularity; for all which I am indebted to my friend and Engraver, Mr ROBERT HAVELL. Once more surrounded by all the members of my dear family, enjoying the countenance of numerous friends who have never deserted me, and possessing a competent share of all that can render life agreeable, I look up with gratitude to the Supreme Being, and feel that I am happy. The adventures and vicissitudes which have fallen to my lot, instead of tending to diminish the fervid enthusiasm of my nature, have imparted a toughness to my bodily constitution, naturally strong, and to my mind, naturally buoyant, an elasticity, such as to assure me that, though somewhat old, and considerably denuded in the frontal region, I could yet perform on foot a journey of any length, were I sure that I should thereby add materially to our knowledge of the ever-interesting creatures which have for so long a time occupied my thoughts by day, and filled my dreams with pleasant images. Nay, Reader, had I a new lease of life presented to me, I should chuse for it the very occupations in which I have been engaged.