JDH last wrote to Charles Lyell in Sep 1842. He now continues the story of the expedition. The cliff of Cape Horn did not live up to its reputation. The expedition went to Hermite Island in Fuegia. Mentions [Charles] Darwin's account of it as the summit of a submerged mountain. JDH collected Cryptogamia previously found by Menzies, Forster & Banks plus new mosses. Describes St Martin's Cove & the view of the island. Describes the island geology in detail, mentions Maxwell Harbour, Cape Spencer & arseniate of iron. The only notable insect was a Carabus. Discusses Fuegian weather. Recounts a discussion with an officer of the 'Philomel' re. Darwin's thoughts on Falkland Islands' geology. Describes the geology of the Falklands: very uniform, consisting of quartz, peat bogs & clay. Only abundant vegetation in the Falklands is grasses, noted European introductions incl: Veronica serpyllifolia, Poa Annua, Rumex sp. & Alsine nudia. JDH found pumice from the South Shetlands. Mentions a rock off the coast seen by Lieutenant Burdwood & now submerged. The expedition sailed south for Antarctica on 17 Dec & saw first ice near Clarence Island. Reached land at 'Cape Francais' & followed the coast south. Describes the landscape incl. mountainous coast, glaciers, volcanic islands & islands named by D'Urville: Trinity Land, Palmer's Land, Terre Louis Phillippe & Terre Joinville & the great landmass Biscoe called Graham's Land. Describes in great detail the geology, geography & climate of a volcanic island they landed on. Compares the snow there to that on Mt Etna as described in Lyell's son's PRINCIPLES OF GEOLOGY. Birdlife incl. Petrels, Penguins & Cormorants. Only moss, lichen & seaweed can survive the conditions on the island. Ice stopped them tracing Weddel's route but on 5 Mar reached their most southerly point 71 degrees latitude. JDH reports arriving at False Bay, Cape of Good Hope to anchor in Simon's Bay. Offers rocks to Lyell's son Charles & birds & shells to his daughters.