COPPER MINES. 
341 
go on with his work. I therefore instructed him to 
organize a party for the linear Survey of the Gila, 
and to make the necessary arrangements for wagons, 
mules, horses, camp-equipage, subsistence, etc., which 
would be furnished him by the Quarter-master and 
Commissary, of the Commission. He lost no time in 
complying with my instructions, but at once selected 
his assistants, and prepared to take the field. 
The day after the arrival of Mr. Surveyor Gray and 
General Conde, a meeting of the Joint Commission 
took place, when arrangements were entered into to 
commence the survey of the Gila, the General and 
his assistants, on the part of the Mexican Commission, 
undertaking the astronomical portion, while Mr. Gray, 
with his corps of engineers and surveyors, was to 
make the linear survey. We now only required the 
arrival of Colonel Graham to organize an astronomical 
force on the part of the United States. 
On the 25th of July, Mr. Gray addressed me a let- 
ter objecting to the Initial Point agreed upon by the 
Joint Commission, at 32° 22' north latitude on the Rio 
Grande, which had been established and marked on 
the 24th of April preceding, and from which the line 
had been extended west by Lieutenant Whipple. He 
advised a suspension of the work. 
I replied to Mr. Gray, that on a further examina- 
tion I was satisfied that the Initial Point on the Rio 
Grande had been established according to the treaty, 
and that I should adhere to the agreement entered 
into relating to it. I soon after, on the 8th of August, 
advised the Secretary of the Interior of Mr. Gray’s 
objections. 
