European Scientists.- A collection of correspondence comprising: Gustave Heinrich Reichenbach, German botanist and the world's leading orchid specialist, 4pp. to ‘Monsieur Le Chevalier’, signed & dated, 1857; Christiaan Henrick Persoon, South African botanist, 4pp. to Giuseppe Raddi, rich with botanic information including a discussion of the liverwort genus Blasia, Paris 1828; Carl August Bolle, founding member of the German Ornithological Society, 3pp. to a ‘Mr Kralik’, Berlin, 1854; Nils Johan Andersson, Swedish botanist, travelled on the HSMS Eugenie on the first Swedish circumnavigation, 1pp., n.d.; Willelm Vrolik, Dutch anatomist and pathologist, 3pp., 1857; Angelo Bellani, Italian physicist, the inventor of new types of aerometers and the first to use the thermometer for precision studies in meteorology, 1 pp. regarding a gift of meteorology books to Prof Andrea Cozzi, director of the Sta Maria Nuova pharmacy, 1845; Jacques Etienne Gay, Swiss-French botanist, extensive 4pp. discussing botany and botanists, including praise for Philip Barker Webb, Paris, 1856; Antonio D'Achiardi, one of the founders of mineralogy in Italy, a biographical note in the form of a table, 2pp. returned to Prof. Angelo de Gubernatis, 1839; Joseph August Schultes, Austrian botanist, physician and writer, in 1792 invented a diver’s helmet with a separate supply of compressed oxygen, 4pp. with a reprimand to a husband with regards to his wife and a diatribe on Napoleon's invasion of Russia Landshut, 1812; v.s. (9)