To His Excellency, JOHN BIGLER, 



Governor of the State of California : 



DEAR SIR: 



Pursuant to an Act passed in May last by the Senate and Assembly of 

 this State, authorizing a farther examination of the unexplored portions of the 

 State, I have the honor to submit the following Report and accompanying dia 

 grams. 



tours, &c. 



JOHN B. TRASK. 



