I quite agree that we only differ in DEGREE about the means of dispersal, and that I think a satisfactory amount of accordance. You put in a very striking manner the mutation of our continents, and I quite agree; I doubt only about our oceans.
I also agree (I am in a very agreeing frame of mind) with your argumentum ad hominem, about the highness of the Australian Flora from the number of species and genera; but here comes in a superlative bothering element of doubt, viz., the effect of isolation.
The only point in which I PRESUMPTUOUSLY rather demur is about the status of the naturalised plants in Australia. I think Muller speaks of their having spread largely beyond cultivated ground; and I can hardly believe that our European plants would occupy stations so barren that the native plants could not live there. I should require much evidence to make me believe this. I have written this note merely to thank you, as you will see it requires no answer.
I have heard to my amazement this morning from Phillips that the Geological Council have given me the Wollaston Medal!!!
Ever yours, CHARLES DARWIN.
CHARLES DARWIN TO J.D. HOOKER. Down, January 23d, 1859.
...I enclose letters to you and me from Wallace. I admire extremely the spirit in which they are written. I never felt very sure what he would say. He must be an amiable man. Please return that to me, and Lyell ought to be told how well satisfied he is. These letters have vividly brought before me how much I owe to your and Lyell's most kind and generous conduct in all this affair.
...How glad I shall be when the Abstract is finished, and I can rest!...
CHARLES DARWIN TO A.R. WALLACE. Down, January 25th [1859].