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JDH writes that he is glad to hear of Sir William Turner Thiselton-Dyer's [WTTD's] appointment to the Dublin chair [of the Royal College of Science for Ireland, Dublin]. Has seen Dr [Edward Percival] Wright who is happy for WTTD to have access to, & make use of, the T[rinity] C[ollege] Herbarium. However, Wright wishes WTTD to wait a little before taking a more prominent position than himself so that 'matters will arrange themselves'. Wright is talking of getting leave for 2 years & going abroad, leaving WTTD in charge. JDH says that the vegetable products museum should be attached to the Botanic Garden, along with a Herbarium & Library, without which the garden will be useless. JDH cannot supply structural specimens of plants from the RBG Kew museum as all duplicates are sent to places which give things in return. Will be happy to give advice about Cape Flora & thinks it is a worthy endeavour to finish it. Notes that WTTD will probably not be ready to embark on the descriptive part of the flora, & therefore need the herbarium, before Wright leaves anyway.

JDH compliments Sir William Turner Thiselton-Dyer [WTTD] on his paper on 'Spontaneous Generation & Evolution' & hopes that it is a prelude to further research into the chemistry of vegetation as JDH believes there is no better man to do it. JDH is currently reading John Tyndall's paper 'On the Actions of Rays of High Refrangibility upon Gaseous Matter' in PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON & he is struck by Tyndall's remarks on the decomposition of carbonic acid, by solar rays, in the leaves of plants. JDH says that he had thought about this independently & believes it would make a good research subject. Has heard that Dr P[ercival] Wright it going to Algeria for the winter. JDH hopes that he has left the key to the [Trinity College] Herbarium for them.

JDH asks if William Thiselton-Dyer would be willing to contribute descriptions of orders, genera & species for a proposed flora of India & outlines the terms of employment.

JDH informs William Thiselton-Dyer that he has had a letter from Sir Henry Barkly [Governor of Cape Colony] urging the completion of FLORA CAPENSIS & suggesting that Peter MacOwan, an experienced Cape botanist, be sent to England for a year to accomplish this. JDH passes on MacOwan's feelings on the subject & asks for Thiselton-Dyer's opinion. He also asks if Thiselton-Dyer will be able to describe any families for a flora of India.

JDH writes that he is pleased William Thiselton-Dyer is starting work on the Asclepiadoideae [for FLORA CAPENSIS]. The herbarium of Robert Wight will be at Thiselton-Dyer's disposal. William Henry Harvey is a model of how to approach complex systematic work. JDH approves of Thiselton-Dyer's plan to have an educational museum in the [botany] department [of Royal College of Science for Ireland]. Discusses sending Welwitschia specimens for the museum, 2 live specimens have already been sent from RBG Kew to Glasnevin [National Botanic Gardens, Ireland]. JDH will send Thiselton-Dyer Asclepiad flowers as they bloom at RBG Kew & a copy of Benjamin Delessert's ICONES SELECTAE PLANTARUM QUAS IN SYSTEMATE UNIVERSALI with figures by Joseph Decaisne. JDH adds he has not heard from India House about a flora of India, he is concerned about 'the neuralgia' & would like Salix specimens from Dr Moore for Kew's new 'Salicetum'.

JDH asks William Thiselton-Dyer his opinion on the qualifications of Mr Archer to fill the chair of Botany at Dublin, vacated by Thiselton-Dyer. JDH has heard Archer is being prevented from applying in deference to Dr Percival Wright.

JDH asks William Thiselton-Dyer to consider a post as his private secretary. The letter lays out the main duties, hours and salary for the job.

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.

JDH informs Thiselton-Dyer that his wife, Frances Hooker, is unwell & so JDH will not be coming to work [in the RBG Kew herbarium] for a few days. He asks Thiselton-Dyer to consult Mrs Hooker's letters to determine what needs doing, & to continue work on the FLORA INDICA. If he completes the Dipterocarpeae Thiselton-Dyer should put the Impatiens in order for description. JDH has written to Daniel Oliver [Keeper of the herbarium] to ask him to put miscellaneous dried collections in order by genera. JDH will need to come to work to do the BOTANICAL MAGAZINE, when will depend on his wife's health.

JDH asks Sir William Turner Thiselton-Dyer to take special note of how Wilson Saunders cultivates plants from the Cape [Cape Peninsula, South Africa] so they can emulate the techniques in the pits at RBG Kew. He also wants to know where Saunders got the Elleanthus chrysocomus & Cotyledon mamillaris which he gave RBG Kew. Mr Pritchard has informed JDH that [William] Carruthers will drop his claim [that the RBG Kew herbarium should be transferred to the British Museum of Natural History to form one national herbarium] if papers can be produced that prove the RBG Kew herbarium is government property. The C. S. [Civil Service?] Commission have informed JDH that Spink's exams put him at the bottom of a list of 5 candidates [for a gardener position at Kew]. [George] Nicholson, a candidate with no training or references had the highest scores & impressed [John] Smith with his capacity so JDH has agreed to hire him. Thanks to ' [Acton Smee] Ayrton's folly' Nicholson will be on twice the salary he would have accepted, £150 per annum rather than £75. In additional marginal notes JDH mentions a letter from Reynold, [George] Bentham & his Linnean Society 'matter', & asks Thiselton-Dyer to write a few pages on the distribution of [Nathaniel] Wallich's Dipterocarps.

JDH asks William Thiselton-Dyer to inform Mr New whether or not he will be able to read JDH's paper on Kilimanjaro plants at the Linnean Society. JDH is leaving Beitrich for Gerolstein, & will then cross the Eifel to Altenahr & return home via Bonn or Aix. Mention's Kendall's death. JDH's tour has so far covered Luxembourg, Treves [Trier] & Berncastle [Bernkastel]. The weather has been cold & he has observed that the vegetation is not as far advanced as at RBG Kew & fruit & nut crops have been killed.

JDH reports that he & [Thomas Henry] Huxley are enjoying their time in France. He asks Thiselton-Dyer how his class is going [Thiselton-Dyer took over Huxley's summer course in elementary biology in 1873 as Huxley was away for his health]. JDH & Huxley have been studying a volcanic phenomenon [volcanic plug] & subsequent glacial action. JDH finds the scenery beautiful. Although the flora is diverse he is not collecting plants. Asks Thiselton-Dyer to tell Daniel Oliver he prefers Le Puy to Nuremberg & to pass on any messages from Oliver or [John] Smith.

[Letter in French, transcript available in French and English]. JDH writes that he is sending Sir William Turner Thiselton-Dyer [WTTD] a corrected copy of the [KEW ANNUAL] REPORT & leaves it to WTTD's discretion when it is ready to send to the printers. JDH & his party travelled to Nimes by rail via the mountains from Clermont Ferrand & JDH was impressed by the basalt landscape, which he describes. The vegetation is not more advanced than in England but the trees coming into leaf were attractive. JDH wonders why there is so much variation in the colour of different species' young leaves but not their mature foliage. In the southern valleys JDH saw olive, wild chestnut & evergreen oak. JDH praises the Jardine de Plantes, Paris, which [Joseph] Decaisne showed them. JDH discusses [Adolphe] Brogniart's views on palaeobotany; his opinion that [William] Williamson's theories are superior to [William] Caruthers' & his belief that there are no Polypodiaceae fossils in the coal beds. The party will next visit [Jules Emile] Planchon in Montpellier then go to Pont du Gard, Arles, Cannes, to see Mr [Gustave-Adolph] Thuret in Antibes & [Daniel] Hanbury in Menton. There is an addenda to the letter, written in English, under date 30 [Apr 1874] in which JDH reiterates the places they have visited & reports that he read about the resignation of G. Russell in GALIGNANI'S MESSENGER & that he himself is still mildly ill with a cough.

JDH reports that the slightly cold weather in Cannes & Montpellier have aggravated his rheumatism. Criticises the maintenance of [Jules Emille] Planchon's garden in Montpellier & attributes this to the fact that they try to grow twice as many species as necessary on a small budget. The aging Professor Charles Martins gave a charming tour of the garden. At Montpellier station met with [Hugh Algernon] Weddell arriving from Cette [Sète], where he had been doing lichen research. Mrs [Frances] Hooker is going to Florence to stay with Miss Galton. JDH is happy 'to miss' the presidency of 'Section D' [at the Florence International Botanical Congress] & supports [John] Tyndall for a vice-presidency. Mentions the Roman ruins at Nimes & a trip from Nimes to Pont du Gard ruin, where he gather 42 species in a single spot. Tomorrow they leave for Antibes where they may see [George James] Allman if he has not left for San Remo. They then go to stay with Mr Hanbury at Mentone [Giardini Botanici Hanbury previously known as Palazzo Orengo], and on to Genoa, Pisa & Florence. JDH reports that [Geroge] Bentham is well but 'put out' to hear that Cambridge Universoty has awarded him the peculiar honour of LL.D. Adds that having met St George Jackson Mivart in Paris & found him to be a willing candidate for secretary of the Linnean Society this information has been met with enthusiasm from Frederick Currie [Currey].