My dear Lyell

Very many thanks for Glöger; but I have it; so I have sent it as from you to the Zoolog. Soc.¹ Thanks also about the hairy men which I possess.² Lewes has published 3 or 4 articles altogether, but not in successive numbers & there are 1 or 2 more to appear.³ They seem to me very clever, tho’ I differ greatly from him on many points. It is refreshing to read articles on this subject which show independent thought.

M^rs Agassiz’s book has been read aloud to me & I am wonderfully perplexed what to think about his precise statements of the existence of glaciers in the Cearà M^ts, & about the drift formation near Rio. There is a sad want of details; thus he never mentions whether any of the blocks are angular, nor whether the embedded rounded boulders, which cannot all be disintegrated, are scored. Yet how can so experienced an observer as A. be deceived about lateral & terminal moraines?⁴ If there really were glaciers in the Cearà M^ts it seems to me one of the most important facts, in the history of the inorganic & organic world, ever observed. Whether true or not it will be widely believed, & until finally decided will greatly interfere with future progress on many points. I have made these remarks in the hope that you will coincide.

If so do you think it w^d be possible to persuade some known man, such as Ramsay, or what w^d be far better, some 2 men, to go out for a summer trip, which w^d be in many respects delightful, for the sole object of observing these phenomena in the Cearà M^ts, & if possible also near Rio.⁵ I w^d gladly put my name down for £50 in aid of the expence of travelling. Do turn this over in your mind. I am so very sorry not to have seen you this summer but for the last 3 weeks I have been good for nothing & have had to stop almost all work—

I hope we may meet in the autumn   yours affectionately | Ch. Darwin