We can hardly doubt that it was written in 1859, for at this time Mr.Huxley was collecting facts about breeding for his lecture given at the Royal Institution on February 10th, 1860, on "Species and Races and their Origin." See "Life and Letters," II., page 281.) Down [June ?] 9 [1859 ?].
If on the 11th you have half an hour to spare, you might like to see a very good show of pigeons, and the enclosed card will admit you.
The history of error is quite unimportant, but it is curious to observe how exactly and accurately my grandfather (in "Zoonomia," Volume I., page 504, 1794) gives Lamarck's theory.

I will quote one sentence.
Speaking of birds' beaks, he says: "All which seem to have been gradually produced during many generations by the perpetual endeavour of the creatures to supply the want of food, and to have been delivered to their posterity with constant improvement of them for the purposes required." Lamarck published "Hist.

Zoolog." in 1809.

The "Zoonomia" was translated into many languages.
LETTER 77.

TO C.LYELL.Down, 28 [June 1859].
It is not worth while troubling you, but my conscience is uneasy at having forgotten to thank you for your "Etna" (77/1.