Thanks for Smith's hospitality at Norwich. Discusses the 'Byssus barbata' figured in "English Botany": after viewing Lady Elizabeth Noel's specimen believes that [James] Sowerby's and [William] Withering's are different species. Believes that there is a oversight in the literature stating that 'Byssus fulva' is a 'B. barabata', compounded by Dillenius, [William] Hudson, [John] Ray, and [William] Withering all repeating this. Sends a drawing of 'Byssus fulva' [not extant] and makes general observations taken from "Flora Anglica" on the genus 'Byssus' and species 'B. fulva' and 'B. barbata'. Spent an evening with Hanbury Williams who remains cheerful but has given up parties.

Asks if the 'Fucus fastigiatus' of the Linnaean herbarium has any fruit on it as described in "Linnean Transactions" vol 3 p200, and if so requests smallest sample possible in order to draw it under microscope; he has made some important discoveries respecting fructification in this species and its affinities.

Requests to become a subscriber of "Flora Graeca". Does not wish the remaning volume of "Flora Anglica" ["Flora Britannica"?] to come out until the modern cryptogamists are more advanced. Has much to add to the physiology of 'Fucus' from parcels of winter specimens in fruit sent from Cornwall, Bognor, [Sussex], and the Isle of Wight.

Has sent letterpress of his third fasciculus [probably "Nereis Britannica"] to [Dawson] Turner for Smith's opinion. Hopes Smith received specimen of 'Lichen vulpinus'; observations. Encloses specimens of 'Byssus fulva', observations; drawings of 'B velutina v aurea', observations. Sent specimen of 'Auricularia papyrina' to Turner; observations.

[Spec 25 written in pencil at head of verso of first folio]

Sending Smith a book on marine plants recently published in France [title not given], to be returned. Reminds Smith of the 'Byssus' specimens he sent last year; observations on the genus, thinks them nearly allied to 'Conferva'. He brought some "curious" foreign 'Fucus' from Paris, which he sent to [Dawson] Turner, difficulties of another in delineating them.