varying, and my theory will be proved to be all wrong.

In Murchison's address to the Geographical Society, just delivered, he
points out Africa as being the oldest existing land. He says there is no
evidence of its having been ever submerged during the Tertiary epoch. Here
then is evidently the place to find early man. I hope something good may
be found in Borneo, and that the means may be found to explore the still
more promising regions of tropical Africa, for we can expect nothing of man
very early in Europe.

It has given me great pleasure to find that there are symptoms of
improvement in your health. I hope you will not exert yourself too soon or
write more than is quite agreeable to you. I think I made out every word
of your letter, though it was not always easy.

(406*/4. For Wallace's later views see Letter 408, note.)


LETTER 407. TO W. TURNER.

(407/1. Sir William Turner is frequently referred to in the "Descent of
Man" as having supplied Mr. Darwin with information.)

Down, December 14th [1866].

Your kindness when I met you at the Royal Society makes me think that you
would grant me the favour of a little information, if in your power. I am
preparing a book on Domestic Animals, and as there has been so much
discussion on the bearing of such views as I hold on Man, I have some
thoughts of adding a chapter on this subject. The point on which I want