His remarks on the relations of naturalised plants will be very useful to me; on the ranges of large families seemed to me good, though I believe he has made a great blunder in taking families instead of smaller groups, as I have been delighted to find in A.Gray's last paper.

But it is no use going on.
I do so wish I could understand clearly why you do not at all believe in accidental means of dispersion of plants.

The strongest argument which I can remember at this instant is A.de C., that very widely ranging plants are found as commonly on islands as over continents.

It is really provoking to me that the immense contrast in proportion of plants in New Zealand and Australia seems to me a strong argument for non-continuous land; and this does not seem to weigh in the least with you.

I wish I could put myself in your frame of mind.