"You know more than I." "There is not a doubt but that upon the location of the mail route, there will be a considerable emigration to this country, and if a portion of Sonora be organized, large numbers will come both from the East and West. The country is an excellent one for stock of all kinds, of which there were great numbers where the Apaches were gathered under the wing of the Catholic church. The valleys of Santa Cruz, San Pedro, and Upper Gila, and also that of Messilla, contain large bodies of productive lands, and all the cereals grow luxuriantly therein. THAT THERE IS MUCH SILVER IN THE TERRITORY THERE IS NO DOUBT, but it requires capital to develop it. As yet but little progress has been made in mining. Evidences of old works are seen on many of the water courses, but operations have not yet been recommenced, except at Arizona, Sopori, and Ariaola, principally because the country is very partially settled, and it is not safe to be at any distance from the mass of the population, and the troops. Copper ore is found in many localities, but little gold is yet discovered. If the road from El Paso to Fort Yuma be located by Parke's route, as many suppose, A FINE COUNTRY WILL BE OPENED on the Gila and Lower San Pedro, which will produce ample supplies. The Territory presents no difficulties of importance to the successful establishment of the road. Frequent stations and PROPER PROTECTION ARE ONLY REQUISITE TO ENSURE SUCCESS AS COMPLETELY AS THE MOST SANGUINE ANTICIPATE. Should Sonora, or even a portion of it be organized, this will be one of the most pleasant localities of our country. A delightful climate, plenty of fine fruit, facility of supply by a port on the Pacific, semi-weekly mails from the east and west,--are only some of the attractions which it would possess. Sonora is quiet. Many of the wealthy men there are in favor of annexation, it is said, but they have to keep silent on the subject for fear of noisy patriots, who would proclaim them traitors at once, if they made a parade of their inclinations. The San Antonio and San Deigo mail passes through Tueson once a fortnight, and seems to have met with no important obstacle yet. A drove of mules accompanies it, which are harnessed in turn. When regular stations are established its speed will be much increased. My last letter was not written with a view of the use being made of it you mentioned, yet if it answers a good purpose, I have no objection. It was but a careless note, but its contents were truths, nevertheless." (This note demonstrated the facility of supply for the Territory from the Pacific.) "Most truly your friend, (Signed,) E. H. Fitzgerald." Tubac, Gadsden's Purchase, 22d Oct., 1857.