Fragment glued to CD’s notes on rock specimens. The recto refers to one of CD’s specimens, the verso mentions his Keeling Island plants.

Sends information about, and dates of treatment of peaty fields. Marl seems to have sunk to the natural stratum of hard white sand which lies below the peat.

Thanks for "Maer Hypothesis" ["Formation of mould" (1840), Collected papers 1: 49–53].

No summary available.

RF declines to give an opinion on the wording of the preface to CD’s volume [Journal and remarks, vol. 3 of Narrative, published separately as Journal of researches] and refers him to a disinterested third party.

CD’s response [missing] comes from the heart. RF explains that CD’s preface [to Journal and remarks, vol. 3 of Narrative] offended him in not acknowledging the part RF and the other officers had in helping CD. Beagle voyage was the first on which officers could have kept any specimens they collected, but they gave preference to CD.