Returns Sir Joseph Banks' pamphlet on wheat blight; observations on blight. Uncertain whether he has ever seen barberry plants at Rollesby, [Norfolk], and though he acknowledges the poor soil has never heard of any remarkable wheat blight. Has never seen confirmation of barberry causing blight but knows of a tenant who is eradicating all barberry in the hedges around his fields. Hopes the seeds of the blighted grass have blown across to Europe to do their enemies "more damage than the Catamarans have done". Wonders whether night of severe frost in June may have caused the blight; other observations on wheat blight and Banks' remarks. Speculates on airborne seed of fungus.