Analytical and topical lnd ex to the Reports 
~ 
of the Chief of 
~1 Engi n e e r sand the Officiers of the Corps of Engineers, United 

" 
States Army upon works and surveys for River and Harbor Improvement. 
(Vol. I. Washington 1881 nicht zugekommen.) Vol. 11 
1880-1887. Compiled under the Direction of Lieut. Col. Henry 

M. Ro b ert, Corps of Engineers. By Louis Y. Sc h erm erhorn, 
C. E., and Holden B. <~~~••e!.~.~_~.~.,?:~:, 8.'Washington, 1889.