Hodeslea, September 30, 1893.
Dear Professor Pelseneer,
I send herewith (by this post) a full explanation of the plates of Spirula (including those of which you have unlettered copies). I trust you will not be too much embarrassed by my bad handwriting, which is a plague to myself as well as to other people.
My hope is that you will be good enough to consider these figures as materials placed in your hands, to be made useful in the memoir on Spirula, which I trust you will draw up, supplying the defects of my work and checking its accuracy.
You will observe that a great deal remains to be done. The muscular system is untouched; the structure and nature of the terminal circumvallate papilla have to be made out; the lingual teeth must be re-examined; and the characters of the male determined. If I recollect rightly, Owen published something about the last point.
If I can be of any service to you in any questions that arise, I shall be very glad; but as I am putting the trouble of the work on your shoulders, I wish you to have the credit of it.
So far as I am concerned, all that is needful is to say that such and such drawings were made by me.
Ever yours very faithfully,
T.H. Huxley.
Hodeslea, October 12, 1893.