SCIENTIFIC INTERESTS 31 
{Puhionaria angustifolia) . Joseph, examining these, concludes 
that it is one and the same with our common lungwort 
(P. officinalis), but that Linnaeus' P. officinalis is not a British 
plant. 
From his visit to Yarmouth he returned on November 8, 
and on the 10th his father writes : 
I need hardly tell you that the boy has enjoyed his visit 
much and seems really grateful for the privileges he has 
enjoyed, especially under your roof. He is quite disposed 
to work at the classes, and set out yesterday morning before 
breakfast to enter them. He takes Surgery, Chemistry, 
Materia Medica, Anatomical demonstrations, and occasion- 
ally the dissecting-room. He is gone to-day to endeavour to 
arrange with Mr. Arnott ^ to give him two hours a day at 
Latin, as you kindly suggested. Thus you see his time will 
be fully occupied, and he can only reckon on a hohday now 
and then to allow him to devote some attention to naturalist 
pursuits. 
Next summer we find him geologising, in Arran, with his 
friend Thomas Thomson.^ And to go forward a year, on 
January 9, 1839, Sir WilHam tells Dawson Turner : 
^ George Arnott Walker Arnott (1799-1868), who had given up the law 
for botany, was a close friend of Sir W. Hooker, with whom he collaborated 
from 1830-40 in describing the plants of Beechey's voyage, and in 1850 in the 
sixth edition of the British Flora. In 1839 he acted as Sir William's substitute, 
and from 1845 till his death held the Glasgow chair of Botany. 
2 This Thomas Thomson (1817-78), naturalist and traveller, was the 
eldest son of Thomas Thomson, Professor of Chemistry at Glasgow from 1817. 
A schoolfellow of the Hooker boys, he was equally devoted to science, and at 
the age of seventeen did some remarkable original work in geology, and later, 
no less original chemical work under Liebig. He graduated M.D. in 1839 with 
the Hookers, and entered the service of the East India Company as assistant 
surgeon. He had a perilous adventure during the invasion of Afghanistan, 
ill-famed for the massacre of the Khoord Kabul, for he was captured by the 
Afghans at Ghazni, and narrowly escaped being sold into slavery in Boldiara, 
1842. Meantime, as later during the Sutlej campaign and his subsequent stay 
in the Punjaub, he studied Indian and Himalayan botany. As one of the com- 
missioners for marking the boundary between Kashmir and Chinese Tibet in 
1847, he travelled into little known regions, embodying his geological and 
botanical observations in his book. Travels in the Western Himalayas and Tibet, 
in 1852. At the end of 1849 he joined Hooker at Darjeeling, and travelled with 
him for fifteen months on his later expeditions, especially to the Khasia Moun- 
tains. Returning to England in broken health, he spent several years at Kew, 
working at his collections, and bringing out, in collaboration with Hooker, the 
first and only volume of the Flora Irwlica. From 1854 to 1861, he was again 
in India as superintendent of the Calcutta Botanical Gardens in succession to 
Dr. Falconer, Professor of Botany. Later he lived again for a time at Kew. 
