The Royal School of Mines, Jermyn Street, London, June 7, 1865.

My dear Sir,

Many thanks for your letter, and for the welcome present of your portrait, which I shall value greatly, and in exchange for which I enclose my own.  Indeed I have delayed writing to you in order to be able to send the last “new and improved” edition of myself.

I wish it were in my power to help you to any such appointment as that you wish for.  But I do not think our government is likely to send out any scientific expedition to the South Seas.  There is a talk about a new Arctic expedition, but I doubt if it will come to much, and even if it should be organised I could not recommend your throwing yourself away in an undertaking which promises more frost-bites than anything else to a naturalist.

In truth, though I have felt and can still feel the attraction of foreign travel in all its strength, I would counsel you to stop at home, and as Goethe says, find your America here.  There are plenty of people who can observe and whose places, if they are expended by fever or shipwreck, can be well enough filled up.  But there are very few who can grapple with the higher problems of science as you have done and are doing, and we cannot afford to lose you.  It is the organisation of knowledge rather than its increase which is wanted just now.  And I think you can help in this great undertaking better in Germany than in New Zealand.

Darwin has been very ill for more than a year past, so ill, in fact, that his recovery was at one time doubtful.  But he contrives to work in spite of fate, and I hope that before long we shall have a new book from him.

By way of consolation I sent him an extract from your letter touching the progress of his views.

I am glad that you did not think my critique of Kolliker too severe.  He is an old friend of mine, and I desired to be as gentle as possible, while performing the unpleasant duty of showing how thoroughly he had misunderstood the question.

I shall look with great interest for your promised book.  Lately I have been busy with Ethnological questions, and I fear I shall not altogether please your able friend Professor Schleicher in some remarks I have had to make upon the supposed value of philological evidence.

May we hope to see you at the meeting of the British Association at Birmingham?  It would give many, and especially myself, much pleasure to become personally acquainted with you.

Ever yours faithfully,

T.H.  Huxley.

The Royal School of Mines, Jermyn Street, June 1, 1865.

My dear Darwin,

Your Ms. [of “Pangenesis”] reached me safely last evening.

I could not refrain from glancing over it on the spot, and I perceive I shall have to put on my sharpest spectacles and best considering cap.

I shall not write till I have thought well on the whole subject.