"Just in the same manner as we see at the present day that very many European productions cover the ground in La Plata, and in a lesser degree in Australia, and have to a certain extent beaten the natives; whereas extremely few southern forms have become naturalised in any part of Europe, though hides, wool, and other objects likely to carry seeds have been largely imported during the last two or three centuries from La Plata, and during the last thirty or forty years from Australia.') I am very glad to hear you are making good progress with your Australian Introduction.

I am, thank God, more than half through my chapter on geographical distribution, and have done the abstract of the Glacial part...
LETTER 344.

TO J.D.HOOKER.

Down, March 30th, 1859.
Many thanks for your agreeable note.

Please keep the geographical MS.
till you hear from me, for I may have to beg you to send it to Murray; as through Lyell's intervention I hope he will publish, but he requires first to see MS.