JDH writes to his father, William Jackson Hooker, whose last letter told of the death of JDH's brother William Dawson Hooker. JDH's messmate Yule is also bereaved, he describes a walk the two took amongst Eucalyptus trees. It is winter in Van Diemen's Land [Tasmania] but JDH has collected a Splachnum & Mniarum forsteri. Describes his collecting habits on Kerguelen Island, where his focus was Cryptogams & seaweeds. JDH's collections now total 700 plants incl. 350 from Cape [of Good Hope]. Describes his & [Ronald] Gunn's time together in Tasmania & the climate & recent weather. Has ascended Mt Wellington & collected some new species. Plans excursions to New Norfolk, the lakes & Port Arthur with the Governor Sir John Franklin. Went to Richmond via Grasstree Hill & met [Thomas] Gregson & Major De Gillon. Declined a trip to Launceston & Oyster Bay proposed by Lady [Jane] Franklin, Kaye[?] went instead. Cryptogammia JDH has collected in Tasmania incl: Hookeria pennata, many lichens & Andraea. Has some seed vessels of Legumes for Bentham. Mentions Bentham's citation for Erica McKayi in De Candolle [PRODROMUS], Thomas Thomson collecting in Aden, Wallich's son at Hull, meeting Mr Gouldie & Dr Coverdale. JDH wants to look at mosses with local microscopist Valentine, makes some observations on calyptrae & setae in mosses, especially Orthotriceae. Discusses' Gunn's new Dawsonia, lack of payment to Gunn from [John Edward] Gray for animals & value of Gunn's correspondence & collections to contribute to ICONES [PLANTARUM]. Comments on WJH's publications incl. the new JOURNAL OF BOTANY. Lady Franklin has set up a Natural History Society & is planning a botanic garden at Kangaroo Bottom, Mt Wellington, JDH describes the site & wild vegetation. Notes the orchids he has found incl. Corysanthes fimbriata & the touch sensitive Pterostylides labellum. The Phanerogams JDH & Captain Ross collected in Kerguelen Island were mostly ruined in a gale, some incl. the cabbage are recovering.