Should you care to have a
large one, of treble or quadruple common size, I will with pleasure send
you one under glass cover, to any address you like in London, either now
or hereafter. I grieve to say we shall not be here on April 2nd, as we
return home on the 31st. In summer I hope that Mrs. Wallace and
yourself will pay us a visit at Down, soon after you return to London;
for I am sure you will allow me the freedom of an invalid.
My paper to-morrow at the Linnean Society is simply to prove, alas! that
primrose and cowslip are as good species as any in the world, and that
there is no trustworthy evidence of one producing the other. The only
interesting point is the frequency of the production of natural hybrids,
i.e. oxlips, and the existence of one kind of oxlip which constitutes a
third good and distinct species. I do not suppose that I shall be able
to attend the Linnean Society to-morrow.
I have been working hard in collecting facts on sexual selection every
morning in London, and have done a good deal; but the subject grows more
and more complex, and in many respects more difficult and doubtful.
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