REPORT OF WILLIAM H. JACKSON. 



LETTEE OF TEANSMITTAL. 



Washington, D. C, March 1, 1878. 

 Sir : I have the honor herewith to transmit a report on the ancient 

 ruins examined by me in 1875 and 1877. 



A preliminary report on the ruins examined in 1875 was published in 

 the Bulletin of the Survey, Vol. II, No. 1. The edition is exhausted, 

 and as it was limited it has iDeen thought advisable to revise the report 

 and republish it with the report for 1877. The illustrations have also 

 been revised and additions made. 



Hoping this report may meet with your approval, I am, very respect- 

 fully, your obedient servant, 



WM. H. JACKSOK 

 Dr. r. Y. Hayden, 



United States Geologist in charge. 



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