My dear Lyell

I am writing to you in order to answer Lady Lyells note to Emma,—as she find writing or indeed doing anything whatever a considerable exertion.

We have been most sincerely grieved to hear such very indifferent accounts of M^rs. Horner:² paradoxical as it may appear, I think, illness after so many years of good health, seems all the more to be deplored.— I had hoped to have come to London this week, & I had calculated on the very great pleasure of seeing you & Lady Lyell; but several combined circumstances will stop me; & chiefly Emma’s state. I do not suppose I shall see you till January.—

Last week my Aunt, M^rs. Wedgwood, expired here quite suddenly & easily.;—a great relief to her, as her life had become a heavy burthen to her.—³

I wish I could see you sooner than I shall, for I sh^d. like to hear what you have been about.— I suppose the Madeira paper will soon be sent in.—⁴

I am working very steadily at my big Book;—I have found it quite impossible to publish any preliminary essay or sketch; but am doing my work as complete as my present materials allow, without waiting to perfect them. And this much acceleration I owe to you.⁵

I know you like all cases of negative geological evidence being upset. I fancied that I was a most unwilling believer in negative evidence; but yet such negative evidence did seem to me so strong that in my Fossil Lepadidæ I have stated, giving reasons, that I did not believe there could have existed any Sessile Cirripedes during the Secondary ages. Now the other day Bosquet of Maestricht sends me a perfect drawing of a perfect Chthamalus, (a recent genus) from the Chalk! Indeed it is stretching a point to make it specifically distinct from our living British Species.— It is a genus not hitherto found in any Tertiary bed.⁶

Farewell | Yours most truly | C. Darwin