[13] This letter may have been written for publication. [14] A reference to the loss of his earlier collection (p. 29). [15] The original of this letter is in the possession of the Trustees of the British Museum. [16] For the other part of this letter see "My Life," i. 379. [17] "My early letters to Bates suffice to show that the great problem of the origin of species was already distinctly formulated in my mind; that I was not satisfied with the more or less vague solutions at that time offered; that I believed the conception of evolution through natural law so clearly formulated in the 'Vestiges' to be, so far as it went, a true one; and that I firmly believed that a full and careful study of the facts of nature would ultimately lead to a solution of the mystery."--"My Life," i. 254-7. [18] "On the Law which has regulated the Introduction of Species."--_Ann. and Mag. of Natural History_, 2nd Series, 1855, xvi. 184. [19] "Life of Charles Darwin" (one-vol. Edit.), p. 171. [20] "Life of Charles Darwin," (one-vol. Edit.), p. 40, [21] _See post_, p. 112. [22] "My Life," i. 359. [23] "My Life," i. 361-3. [24] It will be remembered, that Darwin died in April, 1882, twenty-six years previously. [25] "Life and Letters of Charles Darwin," ii. 188. [26] "The Herbert Spencer Lecture," delivered at the Museum, December 8, 1910. (Clarendon Press, Oxford.) [27] "My Life," ii. 23-4. [28] "On the Law which has regulated the Introduction of New Species."--_Ann. and Mag. of Nat. Hist._, 1855. The law is thus stated by Wallace: "Every species has come into existence coincident both in time and space with a pre-existing closely-allied species." [29] "The Origin of Species." [30] "The Origin of Species." [31] First Edit., 1859, pp. 1, 2. [32] "On the Tendency of Species to form Varieties and on the Perpetuation of Varieties and Species by Natural Means of Selection." By C. Darwin and A.R. Wallace. Communicated by Sir C. Lyell and J.D. Hooker. _Journ. Linn. Soc._, 1859, iii. 45. Read July 1st, 1858. [33] "On the Law which has regulated the Introduction of New Species." _Ann. and Mag. of Nat. Hist._, 1855, xvi. 184. [34] This seems to refer to Wallace's paper on "The Zoological Geography of the Malay Archipelago," _Journ. Linn. Soc._, 1860. [35] Dr. Samuel Wilberforce. [36] Now Major Leonard Darwin. [37] The last sheet of the letter is missing. [38] Wallace's paper was entitled "Remarks on the Rev. S. Haughton's Paper on the Bee's Cells and on the Origin of Species." Prof. Haughton's paper appeared in the _Ann. and Mag. of Nat. Hist._, 1863, xi. 415. Wallace's was published in the same journal. [39] For March, 1864. [40] _Reader_, April 16, 1864. An abstract of Wallace's paper "On the Phenomena of Variation and Geographical Distribution, as illustrated by the Papilionidæ of the Malayan Region," _Linn. Soc. Trans._, xxv. [41] _Anthropolog. Rev._, 1864. [42] _Nat. Hist. Rev._, 1864, p. 328. [43] "Read June, 1864."--A.R.W.