To Charles Lyell [8 June 1850]
Down Farnborough | Kent
My dear Lyell
I have myself seen ripple mark only 6 to 10 feet below low-water mark on coast of Australia: in my Volcanic Isd Book, I give reference on subject at p 1341 —on authority of Mr Siau2 who describes broad ripples at depth of 60 to 70 feet.— You will see by last sentence that I suspect that width of ripples bears relation to depths,3 but how to show this I know not:—it wd be interesting if it could be done.— Many thanks for Theodore Parker,4 which I found at my Brother’s.5 Emma sends many thanks to Lady Lyell for her letter full of news to us.
We are not in the least surprised at her not recognizing Annie, considering how little likely it was that she should be there.—6 I am very glad that you approved of my Paper.—7
Yours most sincerely | C. Darwin
Agassiz has sent me his Lake Superior Book,8 —is not that an immense Honour! [From Emma Darwin to M. E. Lyell]
My dear Mary
I suppose the Hipp. causes a great run upon the gardens9 for Eras. asked Ch. to send him some tickets & therefore these are all he has left which he is very glad you will make use of as we are sure not to want them. We set out for Malvern on Tuesday & shall stay about a week.10 Many thanks for your kind note. yours affectly | E. D. I am very glad your sister Kath. is going on comfortably.11
Discusses depths at which ripple-marks appear on sea-floor.
Personal and social comment.
Mentions receiving Agassiz’s Lake Superior .
Please cite as
Darwin Correspondence Project, “Letter no. 1337,” accessed on 30 April 2016, http://www.darwinproject.ac.uk/DCP-LETT-1337