Jour." XXII., No.

6.) Waterhouse's "Mammalia," and speculated that these two corners, now separated by gulf and low land, must have existed as two large islands; but it is odd that productions have not become more mingled; but it accords with, I think, a very general rule in the spreading of organic beings.

I agree with what you say about Lyell; he learns more by word of mouth than by reading.
Henslow has just gone, and has left me in a fit of enthusiastic admiration of his character.

He is a really noble and good man.
LETTER 342.

TO G.BENTHAM.Down, December 1st [1858 ?].
I thank you for so kindly taking the trouble of writing to me, on naturalised plants.