JDH writes to Thiselton-Dyer regarding Norman Lockyer & Alexander MacMillan, respectively editor & Scottish publisher of NATURE; to which JDH has lent his name. Lockyer has not sent JDH a copy of William Carruthers' letter, JDH considers Carruthers' intellect muddled by a 'fear of extinction'. JDH is going to the funeral of an old friend, Archibald Smith of Jordanhill, in Kensal Green the following day. JDH invites Thiselton-Dyer to dine with him & his cousin Francis 'Frank' Palgrave.