The great sire, bull or man, generates the great daughter. But since Life is earlier in origin and precedes Development, the great mother it must be who first _engenders_ the great son. Because, as I have already pointed out, Life and Reproductive-Energy must exist in the potential before they can evolve upon the plane of personal development. In other words, function precedes structure. The potential of both function and structure must precede the _development_ of either on the plane of Life. Woman, accordingly, is Creatrix of the Race, because in her the Race becomes potential. Man is Artificer of the Race, however, because from him the Race receives its powers of concrete development. For progressive evolutionary advance, therefore, every new generation of females must contribute a new complement of Vital potential, equal in potence to the new complement of Developmental initiative which the new generation of males contribute, and by way of which the female Vital potential is differentiated into further concrete powers. Fruitless for one parent to supply a finer complement than the other is able to render in terms, respectively, of Life or Development. The female potential must be adequate to energise the male powers of differentiation. The male powers must be adequate to differentiate the female potential. II _The female supplies the Typal and Vital Potentials of Adaptation_ To Mr. Regnart, I am indebted for the following further data, which seem further to support my view: "Ursula Raglan was a Beef-cow that milked heavily. To a Beef-bull, she produced Gainford Champion--a great bull. While to a Dairy-bull, she produced the dam of Priceless Princess--about the best Dairy-cow that ever looked through a halter." Here we find the Vital-potential indispensable to the equipment of great offspring, proved great in the mother, by her Female vital-function of lactation. While her respective bull-mates appear as the determinant factors which differentiate this Vital potential in offspring, respectively, into the Beef-traits (stature and muscle, that is) or the Milking-traits (Vital function, that is). The very term "Dairy-bull," signifying a male with power to transmit to female descendants the purely Female trait of milking, is evidence, in itself, of a female trait, derived by a male from his mother, passing into the potential, and lying dormant, or Recessive, for a generation, in his male organisation, and then emerging again in his daughter.