Throughout the whole of this long journey Mr. Audubon took notes of scenes and occurrences by the way. In his descriptions he exhibits the keen observation of the naturalist and the trained eye of the artist. The result is a remarkable picture of social conditions in Mexico, of birds and trees, of sky and mountains and the changing face of nature, of the barrenness of the desert and the difficulties of the journey, of the ruined missions of California, of methods of mining, and of the chaos of races and babel of tongues in the gold fields. It was manifestly impossible to keep a daily journal, and the entries were made from time to time as opportunity occurred. Considering the circumstances under which they were taken, the notes are remarkable for their accuracy. It was Mr. Audubon's intention to rewrite and to publish them in ten parts. One part was printed privately and given to a few friends but distractions at home prevented the continuance of the work. The notes were taken in a series of little books from which they have been faithfully transcribed by his daughter. The only omissions are a few personal references, which form no essential part of the narrative and which she has thought best not to print. A few corrections have been made in the orthography of common words which were misspelled as a result of the haste in which they were written. Where names of places and Spanish words were spelled phonetically, the correct forms have been enclosed in brackets or given in notes at the places where they first occur. In all essential respects the notes are printed exactly as they were left by their author. Many of the names of places are names of haciendas and ranchos, some of which could not be identified. Of those identified, there is some variation in spelling upon the Mexican maps of the period. A few notes have been added chiefly in explanation of personal references in the text. The great bulk of Mr. Audubon's sketches was lost. A few of those that were saved have been reproduced and a portrait of Mr. Audubon, taken in 1853, has been added, together with a map of his route. F. H. H. BIOGRAPHICAL MEMOIR John Woodhouse Audubon, the younger of the two sons of John James Audubon and his wife, Lucy Bakewell, was born in Henderson, Kentucky, November 30, 1812. Those who recall the life of the ornithologist may remember that at this time he was far from his days of prosperity, and was trying to be a business man, with saw-mills and lumber; a venture, which like all his business efforts, did not succeed. Therefore, almost before the boy John remembered, the wandering days began for him, which continued virtually all his life. During his boyhood these wanderings were chiefly confined to that portion of the United States south of the Ohio River, and largely to Louisiana, a section of country he always loved.