My dear Sir

Very many thanks for your kindness in writing to me at such length,² and I am glad to say for your sake that I do not see that I shall have to beg any further favours.

What a range & what a variability in the Cyrena! Your list of the ranges of the Land & F. W. Shells, certainly is most striking & curious; & especially as the Antiquity of four of them is so clearly shewn.³

I have got Harveys sea-side book, & liked it; but I was not particularly struck with it but I will reread the 1^st. & last chapter.

I am growing as bad as the worst⁴ about species & hardly have a vestige of belief in the permanence of species left in me, & this⁵ confession will make you think very lightly of me; but I cannot help it, such has become my honest conviction though the difficulties & arguments against such heresy are certainly most weighty.

Yours very sincerely | Ch Darwin.