JDH writes that he has no fruit of Fothergilla & asks Asa Gray whether it's Endocarp separates as coccis. Mentions Parry's seeds. Has been busy with GENERA PLANTARUM, describes the work he has been doing on various orders, genera and tribes for the book incl.: calyciflorous orders, Cucurbitaceae with input from Charles Victor Naudin, Melastomaceae, Abobreae, Elatereae, Loaseae, Passifloreae, Papayaceae, Modecca, Acharia, Begonias, Cartesia[?], Hamamelideae, Saxifrageae, Bruniaceae, Grubbia, Santalaceae & Corneae. [Letter incomplete, it bears no valediction or signature but is written in the hand of Sir Joseph Dalton Hooker].