11 : 20. For a very interesting series of letters written from Santo Domingo in 1808 concerning conditions among the whites as the negro slaves were gaining the ascendancy, consult the anonymous _Secret History, or The Horrors of Santo Domingo_, in a series of letters written by a lady at Cape François to Colonel Burr (late Vice-President of the United States), principally during the command of General Rochambeau. Lothrop Stoddard, in his _French Revolution in San Domingo_, pp. 25 _seq._, gives a vivid picture of these times and conditions. 11 : 24. _Immigration Restriction and World Eugenics_, Prescott Hall, pp. 125–127. CHAPTER II. THE PHYSICAL BASIS OF RACE 13 : 7. See W. D. Matthew, _Climate and Evolution_; John C. Merriam, _The Beginnings of Human History, Read from the Geological Record: The Emergence of Man_, especially pp. 208–209 of the first part; and Madison Grant, _The Origin and Relationships of North American Mammals_, pp. 5–7. 13 : 20. Mendelism. See Edwin G. Conklin, 1, chap. III, C, pp. 224 _seq._, or 2, vol. X, no. 2, pp. 170 _seq._ Also Punnett’s _Mendelism_, or the appendix to Castle’s _Genetics and Eugenics_, which is a translation of Mendel’s paper. Practically all late writers on heredity give Mendel’s principles. 13 : 22–14 : 10 For these and other statements on heredity see the writings of Charles B. Davenport, Frederic Adams Woods, G. Archdall Reid, Edwin G. Conklin, Thomas Hunt Morgan, E. B. Wilson, J. Arthur Thomson, William E. Castle, and Henry Fairfield Osborn, 2. 14 : 10 _seq._ Blends. E. G. Conklin remarks in correspondence: “In so far as races interbreed, their characters mingle but do not blend or fuse, and come out again in all their purity in descendants.” See also the same authority, 1, pp. 208, 280, 282–287. Every now and then an observation is met with which corroborates this statement. The inheritance from one parent or the other of the shape of the skull, in a fairly pure form, has been noted a number of times. Fleure and James in their study of the _Anthropological Types in Wales_, p. 39, make the following observation: “It may be said that certain component features of head form, in many cases, seem to segregate more or less in Mendelian fashion, but this is a matter for further investigation; we are on safer ground in saying that the children of parents of different head form very frequently show a fairly complete resemblance to one or other parent, _i. e._, that head form is frequently inherited in a fairly pure fashion.”