JH having declined offer from Clarendon Press to write a treatise on inductive logic, [Thomas] Fowler of Oxford, who had earlier written a book on deductive logic, drafted an inductive logic, relying heavily of JH's Prelim. Discourse and Familiar Lectures. Asks JH to make suggestions on the manuscript.

Thanks for CD’s ["Fertilization of orchids", Collected papers 2: 138–56].

Although Thomas Meehan’s paper ["Variations in Epigaea repens", Proc. Philadelphia Acad. Nat. Sci. (1868): 153–6] shows great variability in this genus, JTM sees a need to qualify the generalisation that there is as much variation in the wild as under domestication. He knows no evidence for a constant proportion between variability in the wild and under cultivation.

Observations on correlation between leaf size and exposure to sun and shade.

Has evidence for two varieties of Ophrys apifera in England, which live in mutually exclusive colonies.

Sees no likelihood that private meeting would resolve issue between JH and JS. JS misunderstood JH's argument on valuation of British coins and currency. Encloses JS's note to Editor of the Times.