140 Letters, Extracts, &;c. 



In 1855 Iladde obtained the post of Botanist and Zoologist 

 to Schwartz's expedition to the newly annexed Amoorland, 

 and passed four years in the exploration of that then almost 

 unexplored region. The result of this famous expedition 

 was a series of works and memoirs on the geography, ethno- 

 graphy, and zoology of Eastern Siberia, of which that of the 

 greatest interest to Ornithologists is the quarto volume on 

 the " Festlands-Ornis," published by the Russian Geogra- 

 phical Society in 1863, and well known to most of our 

 readers as containing one of the best accounts of the birds 

 of Eastern Siberia. 



In 1864 Iladde removed to the Caucasus and took up 

 his residence at Tiflis, where he founded a Natural History 

 Museum and Library and remained actively engaged in 

 their administration and on various kindred pursuits up to 

 the time of his death. Next to the Siberian volume, RaduVs 

 1 Ornis Caucasica,' published at Cassel in 1884, is the one 

 amongst his numerous scientific works and memoirs, illus- 

 trative of the Natural History of the Caucasus and of the 

 adjoining portions of the Russian dominions, by which he is 

 best known to Ornithologists. Radde was throughout his 

 life an ardent traveller, and was frequently engaged in ex- 

 cursions of a longer or shorter character. When the Grand 

 Duke Michael made his yacht-voyage to India and Japan in 

 1895, Radde was selected to accompany him, and he was 

 again chosen two years later to go along with some members 

 of the Imperial family to North Africa. Radde spoke 

 English fluently, and was well acquainted with many of our 

 Union, of which he was a Foreign Member. He was also a 

 Foreign Member of the Zoological Society of London, and 

 received one of the Gold Medals of the Geographical Society 

 in 1889. At the time of his death he was engaged in the 

 preparation of an account of the Collections of the Caucasian 

 Museum, of which three volumes (out of six) have already 

 appeared. 



