Sends a 'Potamogeton' for Smith's opinion, wary of [James] Sowerby's view that it is 'Potamogeton [heterophyllus]'. Describes in detail his "haemorrhage of the urinary tract" [hematuria]. Enquires after [Dawson] Turner and [Lewis Weston] Dillwyn [(1778-1855), naturalist]. Questions Smith how the three specimens of 'Daviesia' sent to him correspond with entries in "Annals of Botany" and asks for specimens of the two other species of 'Daviesia', [Smith has annotated each question "yes"]. Sends specimens of 'Juncus', asks which is '[Juncus] articulatus'.