In the third place, in pursuance of the policy I have indicated, you ought also to keep the coasting trade in your own hands and forbid foreigners to engage in it. This coasting trade is clearly not included in the requirement I have indicated as the sole one to be recognized--a requirement to facilitate exportation and importation [483] of commodities. The distribution of commodities brought to Japan from other places may be properly left to the Japanese themselves, and should be denied to foreigners, for the reason that again the various transactions involved would become so many doors open to quarrels and resulting aggressions. To your remaining question respecting the intermarriage of foreigners and Japanese, which you say is "now very much agitated among our scholars and politicians" and which you say is "one of the most difficult problems," my reply is that, as rationally answered, there is no difficulty at all. It should be positively forbidden. It is not at root a question of social philosophy. It is at root a question of biology. There is abundant proof, alike furnished by the intermarriages of human races and by the interbreeding of animals, that when the varieties mingled diverge beyond a certain slight degree the result is inevitably a bad one in the long run. I have myself been in the habit of looking at the evidence bearing on this matter for many years past, and my conviction is based on numerous facts derived from numerous sources. This conviction I have within the last half-hour verified, for I happen to be staying in the country with a gentleman who is well known and has had much experience respecting the interbreeding of cattle; and he has just, on inquiry, fully confirmed my belief that when, say of the different varieties of sheep, there is an interbreeding of those which are widely unlike, the result, especially in the second generation, is a bad one--there arise an incalculable mixture of traits, and what may be called a chaotic constitution. And the same thing happens among human beings--the Eurasians in India, the half-breeds in America, show this. The physiological basis of this experience appears to be that any one variety of creature in course of many generations acquires a certain constitutional adaptation to its particular form of life, and every other variety similarly acquires its own special adaptation. The consequence is that, if you mix the constitution of two widely divergent varieties which have severally become adapted to widely divergent modes of life, you get a constitution which is adapted to the mode of life of neither--a constitution which will not work properly, because it is not fitted for any set of conditions whatever. By all means, therefore, peremptorily interdict marriages of Japanese with foreigners.