Thanks for specimens; some observations. The three specimens from [John] Pitchford are 'Byssus furcata', 'Byssus fubra', and 'Polypodium thelypteris'.

Thanks for 'Bryum rigidum'. No author on Fungi is "to be depended upon", criticises [William] H[udson (c 1730-1793), botanist] and [John] Lightfoot's works. Studying fungi, received some from [James] Crowe. Smith wrong about 'Elymus arenarius'. An 'Elymus philadelphicus' at Sir Joseph Banks'. Has a specimen of 'Elatine alsinastrum'. An 'Arbutus andrachne' sold at [John] Fothergill's [(1712-1780) physician and plant collector] for 51 guineas was not half as large as one at Chelsea.