6:--

Royal Institution, 6 April.

My dear Huxley,

I was rendered drunk by the excess of prospective pleasure when you
mentioned the Eifel yesterday, and took no account of my lectures.
They begin on the 28th, and I have studiously to this hour excluded
them from my thought. I have made arrangements to see various
experiments involving the practical application of electricity before
the lectures begin; I find myself, in short, cut off from the
expedition. My regret on this score is commensurable with the
pleasures I promised myself. Confound the lectures!

And yours on Friday is creating a pretty hubbub already. (On the
Pedigree of the Horse" April 8, 1870, which was never brought out in
book form.) I am torn to pieces by women in search of tickets.
Anything that touches progenitorship interests them. You will have a
crammed house, I doubt not.

Yours ever,

John Tyndall.

Huxley replied:--]

Geological Survey of England and Wales, April 6, 1870.

My dear Tyndall,