Account of various fevers and inflammations suffered by himself, his youngest daughter, his wife, and maid-servant. Death of [Thomas] Purton's eldest son from pulmonary consumption, as well as his partner, who was to have been his son-in-law. Observed again the 'Byssus septica' in his cellar covering everything with particles. Gratified by Smith's remarks on Purton's "Appendix to the Midland Flora". Hopes to see Smith at one of their summer committees [of Apothecaries Company] in Chelsea.