From Mr. Belloc’s feats with Natural Selection we come to his adventures among his ancestors and the fall of man. These are, if possible, even more valiant than his beautiful exposure of the “half-educated assurance” of current biological knowledge. He rushes about the arena, darting from point to point, talking of my ignorance of the “main recent European work in Anthropology,” and avoiding something with extraordinary skill and dexterity. What it is he is avoiding I will presently explain. No one who has read my previous articles need be told that not a single name, not a single paper, is cited from that galaxy of “main recent European” anthropology. With one small exception. There is a well-known savant, M. Marcellin Boule, who wrote of the Grottes de Grimaldi in 1906. Some facetious person seems to have written to Mr. Belloc and told him that M. Boule in 1906 “definitely proved the exact opposite” of the conclusions given by Mr. Wright in his _Quaternary Ice Age_ (1914), and quoted in my _Outline_. Mr. Belloc writes this down, elevates M. Boule to the magnificence of “Boule” simply and follows up with the habitual insults. By counting from his one fixed mathematical point, _zero_ in some dimension unknown to me, he concludes that I must be twenty years out of date, though the difference between 1906 and 1914, by ordinary ways of reckoning, is really not minus twenty but plus eight. The same ungracious humorist seems to have stuffed up Mr. Belloc with a story that for the last twenty years the climate of the earth has ceased to vary with the eccentricity of the earth’s orbit, and that any natural consequences of the precession of the equinoxes no longer occur; that climate has, in fact, cut loose from astronomical considerations, and that you can find out all about it in the _Encyclopædia Britannica_. You cannot. Mr. Belloc should have tried. Some day he must find time to puzzle out M. Boule’s curve of oscillation of the Mediterranean and correlate it with Penck’s, and go into the mystery of certain Moustierian implements that M. Boule says are not Moustierian; and after that he had better read over the little discussion about changes of climate in the _Outline of History_--it is really quite simply put--and see what it is I really said and what his leg-pulling friend has been up to with him in that matter. It may be kinder to Mr. Belloc to help him with a hint. Croll made an excellent book in which he pointed out a number of astronomical processes which must produce changes of climate. He suggested that these processes were sufficient to account for the fluctuations of the glacial age. They are not. But they remain perfectly valid causes of climatic variation. Croll is no more done for than Darwin is done for. That is where Mr. Belloc’s friend let Mr. Belloc down.