A few days ago Sal posted the following quote from Darwin:
From Letter 3154  Darwin, C. R. to Herschel, J. F. W., 23 May [1861]
One cannot look at this Universe with all living productions & man without believing that all has been intelligently designed
As Jack Krebs pointed out (and Sal freely admited, which was why he posted under “humor”), this was a quote mine, and Saint Charles went on to distance himself from this view.ÂÂ
 Nevertheless, as Darwin’s son Francis made clear in his book, Darwin was haunted by thoughts of design to the end of his life. In a July 3, 1881 letter to W. Grahm Darwin wrote: “Nevertheless you have expressed my inward conviction, though far more vividly and clearly than I could have done, that the Universe is not the result of chance.” Francis connects a footnote to this passage in which he recounts the Duke of Argyll’s recollection of a conversatino he had with Darwin. The text of the footnote is:
The Duke of Argyll (‘Good Words,’ A 1885, page 244) has recorded a few words on this subject, spoken by my father in the last year of his life.  ‘. . .in the course of that conversation I said to Mr. Darwin, with reference to some of his own remarkable works on the ‘Fertilization of Orchids,’ and upon ‘The Earthworms,’ and various other observations he made of the wonderful contrivances for certain purposes in nature – I said it was impossible to look at these without seeing that they were the effect and the expression of mind.  I shall never forget Mr. Darwin’s answer.  He looked at me very hard and said, ‘Well, that often comes over me with overwhelming force; but at other times,’ and he shook his head vaguely, adding, ‘it seems to go away.’
Francis Darwin, ed., The Life and Letters of Charles Darwin (New York, D. Appleton & Co., 1905), 1:285