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all defined lines ; 3d, The instrumental location of all 

 water deposits, and connection of the same by a system 

 of levels; and 4th, A careful and thorough examination 

 and study for several months of all the natural features 

 in outline and detail. 



In the conduct of the work, I have been assisted by 

 the following gentlemen : 



G. S. Bachus, Esq., C. E. 



Mr. Stevenson Towle, C. E. 



Mr. Thomas Laurier, C. E., of Brooklyn. 



Mr. W. C. Hawkesworth, City Surveyor, of Brooklyn. 



Mr. Hamilton Ewen, City Surveyor, of Brooklyn. 



Mr. John Crumly, C. E. 



Mr. Frederick Rawolle, B. S. 



To these gentlemen I am, considering the peculiar cir- 

 cumstances through which the work has been prosecuted, 

 under much obligation. 



In the daily prosecution of my labors, I have been 

 more and more convinced of the fitness and adaptability 

 of the ground to the purposes proposed. Of its neces- 

 sity I have no doubt, nor am I less certain that its eco- 

 nomic execution can be secured by strict adherence to 

 well-established rules. 



That the City of Brooklyn may secure, and its inhabi- 

 tants may long enjoy this great public blessing, is my 

 most heartfelt wish. 



Respectfully submitted, 



EGBERT L. VIELE. 



Brooklyn, Jan. 15th, 1861. 



