18 PREFACE. 
to complete the final report contemplated in the first volume, and at all my leisure moments I 
was industriously occupied in preparing the report. This report was in readiness for Congress 
before the close of its last session. 
In its preparation I beg leave to make my acknowledgements to Dr. J. G. Cooper, who 
prepared the tables of my paper on meteorology; Professor W. P. Trowbridge, of the United 
States Coast Survey, who condensed, from the archives of that survey, the paper of Mr. Kohl 
on the hydrography of Puget Sound; and to both Dr. Cooper and my clerk, Mr. W. W. John- 
son, who rendered valuable assistance in condensing and preparing the record matter of the 
journals. In submitting this report, therefore, at this late date, I feel that I have not been 
remiss in the discharge of any duty in connexion therewith, and that the delay has tended 
rather to increase the value of the work by increasing my opportunities of information and 
judgment. 
| ISAAC I, STEVENS. 
Wasuineton Orry, May, 1860. 
