Later in the autumn he wrote to Henslow: "I have not been very well of late, with an uncomfortable palpitation of the heart, and my doctors urge me STRONGLY to knock off all work, and go and live in the country for a few weeks." He accordingly took a holiday of about a month at Shrewsbury and Maer, and paid a visit in the Isle of Wight. It was, I believe, during this visit, at Mr. Wedgwood's house at Maer, that he made his first observations on the work done by earthworms, and late in the autumn he read a paper on the subject at the Geological Society. ("On the formation of mould," 'Geol. Soc. Proc.' ii. 1838, pages 574-576.) During these two months he was also busy preparing the scheme of the 'Zoology of the Voyage of the "Beagle",' and in beginning to put together the Geological results of his travels.
The following letter refers to the proposal that he should take the Secretaryship of the Geological Society.]
CHARLES DARWIN TO J.S. HENSLOW. October 14th, [1837].
My dear Henslow,
...I am much obliged to you for your message about the Secretaryship. I am exceedingly anxious for you to hear my side of the question, and will you be so kind as afterwards to give me your fair judgment. The subject has haunted me all summer. I am unwilling to undertake the office for the following reasons: First, my entire ignorance of English Geology, a knowledge of which would be almost necessary in order to shorten many of the papers before reading them before the Society, or rather to know what parts to skip. Again, my ignorance of all languages, and not knowing how to pronounce a SINGLE word of French—a language so perpetually quoted. It would be disgraceful to the Society to have a Secretary who could not read French. Secondly, the loss of time; pray