Letter from Henslow, John S., to Charles Lyell, 6 April 1841 - 8 June 1854

Two letters:
1) Lyell summarises the letter as Prof. Henslow on formation of Stalactite from Liebig [Justus von Liebig, German Chemist, considered one of the founders of the field of Organic Chemistry].
2) Letter with no summary. Professor Henslow writes to Lyell about his and [Joseph Dalton] Hooker's thoughts on Cyads [Cyadeoidea] and Conifers [Coniferae] in relation to other Dicotyledons and Monocotyledons. He also writes about a new mammal in the Purbeck [a sequence of rock strata in Dorset, England] and states that he believes Lyell will find a mammal from the Cretaceous period to match. He thanks Lyell for news of Hooker's election to the Berlin Academy.