576 Obituary — Miscellaneous. 



THOMAS ROXBURGH POLWHELE, J.P., D.L., M.A., F.G.S. 



Born 1831. Died September 2, 1909. 



Me. Polwhele, who graduated at Cambridge, joined the Geological 

 Survey under Murehison in July, 1857, and in the following year 

 became a Fellow of the Geological Society. He was engaged in tlie 

 mapping of parts of Oxfordshire and Buckinghamshire, and drew 

 boundary-lines, which have proved to be substantially correct, for the 

 clayey equivalents of the Corallian rocks between Wheatley and 

 Quainton. He also surveyed areas of the Bagshot Series and other 

 formations on the borders of Hampshire and Surrey. His geological 

 notes were published in memoirs by his colleagues Mr. Whitaker and 

 the lute Professor A. H. Green. 



Having succeeded to an estate at Polwhele, near Truro, he resigned 

 his post on the Geological Survey on March 3, 1862. He was chosen 

 President of the Geological Society of Cornwall in 1896 and 1897, 

 and delivered addresses on " The Relation of other Sciences to 

 Geology" and on " The Physical Geology of the Earth". He died 

 at his Cornish home, aged 78. 



3yniSOE!LL.A.3SrEOTJS. 



Retieement of Me. "W". A. E. Usshee, F.G.S., of the Geological 

 Stjevey of England. — Mr. W. A. E. Ussher, who joined the staii 

 of the Geological Survey early in 1868, retired on September 30, 

 after a service of more than forty-one years. Commencing work on 

 the borders of the Mendip Hills, he has surveyed and mastered tlie 

 geological structure over a continuous tract of ground extending from 

 that region through Bridgwater to the Quantock Hills, and through 

 the vales of Taunton, Honiton, and Exeter to Plymouth and the 

 Cornish borderland. Although the main features in the geology had 

 been represented on the old one-inch maps of De la Beche, the re- 

 survey was to all intents and purposes a new one as regards details of 

 the strata and tectonic features. To Mr. TJssher we owe the recognition 

 and mapping of the subdivisions of the ISTew Bed rocks from West 

 Somerset to the south coast of Devon, the first account of which was 

 published in the Geological Magazine for April, 1875. To him 

 also our knowledge of the subdivisions, the palaeontology, and the 

 foreign equivalents of the Devonian rocks of South Devon is most 

 largely due. His strenuous and long-continued labours on the geology 

 of that intricate district demanded not merely enthusiasm but an 

 amount of physical energy unsurpassed. In other regions he was 

 occupied for shorter periods, among the Jurassic rocks and drifts of 

 JSTorth Lincolnshire, and in the survey of the superficial deposits on 

 the borders of Greater London and in parts of the south-east of 

 England. 



Change of ]!^ame. — Bibliographers should take note that Mr. H. B. 

 Muff, E.G.S., of the Geological Survey of Scotland, has changed his 

 name to Maufe. 



