INSTRUCTIONS FROM THE WAR DEPARTMENT. 
15 
You will then proceed to the Gila river, and ascertaining carefully the practicability of a 
road between the Pimas villages and the mouth of the San Pedro, you will make the examina¬ 
tions and surveys recommended in your report upon the route surveyed by you between the Gila 
and the Rio Grande. 
Over this ground the geological examination and surveys will be particularly minute, 
because it is especially important here to determine the practicability of obtaining a supply of 
water ample for the uses of a railroad, either by artesian wells or by other modes. 
These duties being completed, should any further examinations oT surveys be assigned to 
you, instructions will be sent to Port Fillmore. Should no further field duties be required of 
you, you will discharge your party, dispose of your outfit to the best advantage, and proceed, 
with your assistants, to this place and make out your report. 
Very respectfully, your obedient servant, 
JEFFERSON DAVIS, 
Secretary of War . 
Lieutenant John G. Parke, 
United States Topographical Engineers , Washington , D, G. 
