Asks to have observations made of a person retching violently, but ejecting nothing from stomach, in order to test relation between spasmodic contraction of orbicular muscles and tears. CD believes tears are caused by matter filling nostrils.

JP’s note [8739] suggests reversion, but that is an easy trap. Will look to the ears of "our brethren at the Zool. Gardens".

Has heard from Ashwin Conway Newman of Guy’s Hospital of a case of a child without any prepuce whose father was a renegade, uncircumcised Jew, but whose ancestors had all been Jews. Newman thinks this a good case of inheritance with reversion. JP’s letter [missing] now shows how rash such a conclusion would be.

Thanks JP for volume of his lectures [Clinical lectures and essays, ed. H. Marsh (1875)].

Mentions "vivisection question".

Thanks JP for his kindness, but unfortunately the [unspecified] case is of no use to him.

Returns an "old book" [? Baeta, Comparative view of the theories and practice of Drs Cullen, Brown and Darwin (1800); see Erasmus Darwin, p. 107]. Glad to see that Dr Erasmus Darwin’s views on fever were attended to.

Fears his life of Dr Darwin will be a poor affair. "Never again will I be tempted out of my proper work."