Wishes JH would lay hands on the memorandum concerning the Zenith observatory on Etna. Explains why JH's theories regarding a point in gunnery do not work in actual practice. Queries the measurement given by JH for the height of Etna.

JDH thanks his father, William Jackson Hooker, for the constructive criticism of his collections, the first he has made in a new country. The collections JDH is leaving for [Ronald Campbell] Gunn to send home are better. Since arriving in Hobart Town [Tasmania, Australia] JDH has only worked on botany, collecting the spring plants in locales advised by Gunn & shunning society with the exception of attending Government house when necessary & a ball given for the ships' officers. Explains why it is impossible for him to collect in the Western tier during the current season. Notes that flora in the centre of the island is less advanced; Acacia mollissima only just in bud in the interior. Describes a collecting excursion to Lake Echo, en route JDH stayed in a stock keeper's hut in Marlborough. Describes the interior of Van Diemen's Land [Tasmania] as a table land of marshes covered in dead Eucalyptus timber - all the trees were killed in the 1837 frost along with the undergrowth of Leptosperma, Bedfordia & Fagus cunninghamii. All nature suffered that year, hundreds of kangaroos died. The forest only survives on the highest hills, where JDH gathered the 'Cyder tree' Eucalyptus, but it was the wrong season to tap for its fluid. On return trip JDH travelled via Hamilton & the estate of the clergyman Mr Naylor at Cheny[?] on the River Derwent. By the river are: Phebalium retusum, Pleurandras, Eurybius & many flowering shrubs. The cataracts [gorge] is densely wooded & full of bush kangaroo & plants new to JDH: a beautiful Gleichenia, Sprengelia, some Eucalypti & Acacia. Briefly discusses novel species he has found amongst the gum trees & the Crucifera & Cryptandra of Van Diemen's Land. Mentions a feature of the labella of Pterostlides [Pterostyllis] orchids. Is still working on his sketches of Kerguelen's Land plants.