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Prom 1847 to 1871 he was in charge of this survey, and produced 

 charts of nearly the whole of the eastern coasts. 



Captain Calver's constant employment in the rivers and estuaries 

 of the east coast gave him great experience in the action of tides, 

 waves, and running water ; and he paid much attention to studying 

 the principles which should underlie works for the conservation of 

 depth and improvements of tidal harbours and entrances. His views 

 on this subject were remarkably sound. They were set forth in 

 various pamphlets, the principal work being entitled, " On the Con- 

 servation and Improvement of Tidal Rivers," published in 1853. In 

 this he anticipated many of the principles which have now for long 

 been accepted in carrying out artificial works ; and his predictions as 

 to the results of various artificial works have nearly all been verified. 

 He made several valuable reports to the Admiralty on the subject of 

 harbours of refuge. 



Captain Calver retired in 1871, and died at Yevey, in Switzerland, 

 where he had of late resided, on 28th October, 1892. 



Captain Calver became an Associate of the Institution of Civil 

 Engineers in 1866, and was elected a Fellow of the Royal Society in 

 1873. 



W. J. L. W. 



