Concerning JH's experiments with photogenic light. Encloses paper of the comparisons between JH's and the Observatory's barometers. R.A.S. and R.S.L. want a subject for medals in astronomy, R.S.L. for a Copley medal in anything.

Captain Crozier of the HMS 'Terror' has just informed JDH that they must sail as the weather is making it dangerous to remain anchored [in the Funchal Roads, Madeira] so JDH has little time to spend on this letter to his Father, William Jackson Hooker. Recounts his time spent in Madeira; botanised for a few days but was then bedridden by rheumatism. After recovering enough, spent some time with Mr Muir & Dr Lippard who brought him fruit. In his limited collecting time JDH only gathered plants he thought were uncommon, it was not the best season to get specimens. The expedition may go to Port Praya [Praia] in the Cape Verde Islands, they will certainly go to St Helena & St Paul's Rock on their way to the equator. JDH & Mr McCormick [surgeon on the HMS 'Erebus'] get on well. JDH has sent flowers from the convent for his Mother & sisters, including myrtle wreaths, they are sent home by Mr Muir via Mr Pamplin. Mentions that he met Mr Johnstone & a lady who were friends of his Grandfather & Mr Baker from Norwich. Notes that the date on his previous letter may be wrong. Mr Hally[?] is in Madeira & is dying. Dr Renton[?] & Mrs Montgomery Hamilton née Wallace have been attentive to JDH. Letter also contains a note from Mr Muir dated 16 Nov 1839, presumably added when he was given the letter to forward. Muir writes that the 'Erebus' & 'Terror' sailed on the 31 Oct [1839], before which he & his family enjoyed JDH's company. Mr Smith of Jordan Hill has since arrived in Madeira with his invalid daughter.