so readily supplied
us with information, especially to Sir Joseph Hooker, Professor Judd,
Professor Newton, Dr. Sharp, Mr. Herbert Spencer, and Mr. Wallace. And
we have pleasure in mentioning Mr. H.W. Rutherford, of the University
Library, to whose conscientious work as a copyist we are much indebted.

Finally, it is a pleasure to express our obligation to those who have
helped us in the matter of illustrations. The portraits of Dr. Asa Gray,
Mr. Huxley, Sir Charles Lyell, Mr. Romanes, are from their respective
Biographies, and for permission to make use of them we have to thank
Mrs. Gray, Mr. L. Huxley, Mrs. Lyell, and Mrs. Romanes, as well as the
publishers of the books in question. For the reproduction of the
early portrait of Mr. Darwin we are indebted to Miss Wedgwood; for the
interesting portraits of Hugh Falconer and Edward Forbes we have to
thank Mr. Irvine Smith, who obtained for us the negatives; these being
of paper, and nearly sixty years old, rendered their reproduction a work
of some difficulty. We also thank Messrs. Elliott & Fry for very kindly
placing at our disposal a negative of the fine portrait, which forms the
frontispiece to Volume II. For the opportunity of making facsimiles of
diagrams in certain of the letters, we are once more indebted to Sir
Joseph Hooker, who has most generously given the original letters to Mr.
Darwin's family.

Cambridge, October, 1902.

TABLE OF CONTENTS.

CONTENTS OF VOLUME I.

Outline of Charles Darwin's Life, etc.

CHAPTER 1.I.--An Autobiographical Fragment, and Early Letters,
1809-1842.

CHAPTER 1.II.--Evolution, 1844-1858.

CHAPTER 1.III.--Evolution, 1859-1863.

CHAPTER 1.IV.--Evolution, 1864-1869.

CHAPTER 1.V.--Evolution, 1870-1882.

CHAPTER 1.VI.--Geographical Distribution, 1843-1867.

ILLUSTRATIONS IN VOLUME I.

CHARLES AND CATHERINE DARWIN, 1816. From a coloured chalk drawing by
Sharples, in possession of Miss Wedgwood, of Leith Hill Place.

MRS. DARWIN, 1881. From a photograph by Barraud.

EDWARD FORBES, 1844 (?). From a photograph by Hill & Adamson.

THOMAS HENRY HUXLEY, 1857. From a photograph by Maull & Fox. (Huxley's
"Life," Volume I.)

PROFESSOR HENSLOW. From a photograph.

HUGH FALCONER, 1844. From a photograph by Hill & Adamson.

JOSEPH DALTON HOOKER, 1870 (?). From a photograph by Wallich.

ASA GRAY, 1867. From a photograph. ("Letters of Asa Gray," Volume I.)

VOLUME II

CHAPTER 2.VII.--Geographical Distribution, 1