In view of these authorities, it is hoped that those who will not believe upon any evidence, will be content in their own incredulity. The most authentic reports of these immense mineral resources have been used as authorities against their existence. The authors of these denials either have never read what they pretend to quote, or think no one else has. The Hon. T. Butler King, who was the first to reveal to an incredulous public the wonders of the California gold mines, has had the singular good fortune to be also among the first to publish correct and authentic information relating to the silver treasures of Arizona. His report upon the resources of the new Territory has all the charm to the reader that his California report had, and its brilliant predictions will be as fully realized. To Gray and Emory is the country most indebted for the earliest and most important discoveries.

The agricultural resources of Arizona, are sufficient to sustain a large mining population, and afford abundant supplies for the great immigration which will follow the development of its mineral resources. The whole valley of the Gila, more than four hundred miles in length, can be made with proper exertion to yield plentiful crops. The Pimos Indians, who live in villages on the Gila, one hundred and seventy miles from its mouth, raise large crops of cotton, wheat, and corn, and have for years supplied the thousands of emigrants who traverse the Territory en route to California. These Indians manufacture their cotton into blankets of fine texture and beautiful pattern, which command a high price. They also grind their corn and wheat, and make bread. In fact, the Pimos realize in their everyday life something of our ideas of Aztec civilization. A town will probably grow up just above the Pimos villages, as there is a rich back country, and the streams afford a valuable water power for running mills.

The valley of the Santa Cruz traverses the territory from South to North, sinking near the town of Tueson, and probably finding its way to the Gila, as a subterranean stream. This valley, of the richest land, is about one hundred miles long, in many places of great width, and has on each side of it many rich valleys of limited extent, watered by streams from the mountains, which flow into the Santa Cruz. The valleys and Ranches of Arivaca, Sopori, Calabazas, and Tueson, are those at present most thickly settled. These produce all the fruits known to a Southern clime—grapes, wheat, corn, and cotton in great abundance. The San Pedro river and valley is also one of great richness, and is reported by Lieut. Parke as capable of sustaining a large population. The Valle de Sauz, still farther East, more limited than the San Pedro or Santa Cruz, can be made available for a considerable population. The Mimbres River also can, by a small outlay, be made to irrigate a large surface and supply a moderate settlement. The various springs laid down by Gray, Emory, Parke, and Bartlett, will all afford water for small settlements, and their supply can be much increased by a judicious outlay of money. The Rio Grande valley is very rich, and in places of great width. The Mesilla valley already contains a population of about five thousand souls, and there is ample room for many more.

If, as proposed, the Northern boundary of the Arizona Territory should enclose the Northern branches of the Gila, an agricultural region will be opened to settlement sufficient in itself to sustain the population of an immense agricultural State. Col. Bonneville, who is now at the head of a large force exploring this region, writes to the Secretary of War that it is the finest country he has ever seen, "valleys capable of sustaining a population of twenty thousand each, teeming at every step with evidences of an immense population long ago-and an ancient and superior civilization." The Hon. John R. Bartlett says of the "Salinas," one of the Northern branches of the Gila, that it alone will supply food for a great State. It must be recollected, in this connection, that the great mineral wealth of Arizona will call for and amply repay for the redemption and expensive cultivation of all the available lands, and that irrigation produces immensely greater crops than the other method of planting. Throughout the whole of Utah, irrigation has been resorted to with the greatest success. The soil in Utah, in no place that the writer saw it, could in any way be compared to that of the bottom lands of Arizona.

Captain Whipple in his valuable report of exploration for the Pacific Railroad, published by order of Congress, crossed the upper part of the region alluded to, and which is watered by the Rio Verde and Salinas. He fully sustains me in my remarks on those rich valleys.

"We are in the pleasantest region we have seen since leaving the Choctaw country. Here are clear rivulets, with fertile valleys and forest trees. The wide belt of country that borders the Black Forest, and probably extends along the Rio Verde to the Salinas and Gila, bears every indication of being able to support a large agricultural and pastoral population. The valley of the Rio Verde is magnificently wooded with furs and oaks, affording excellent timber. Ancient ruins are said by trappers to be scattered over its whole length to the confluence with the Salinas. We, therefore, seem to have skirted the boundary of a country once populous, and worthy of becoming so again. Besides the advantages already enumerated, the mountains in this vicinity bear indications of mineral wealth. Vol. 3, p. 93."

The notes before referred to, in the possession of the writer, speak of great farming and grazing establishments scattered over the whole face of the Territory, between 1610 and 1800, which produced abundant crops of cereals, fruits, and grapes. These statements are confirmed by the testimony of Major Emory and his report, where he enumerates several of the most extensive—by Gray, Bartlett, Parke, and Col. Bonneville. Many of the Ranches, deserted by the Mexicans on account of the Apache Indians, have upon them large, well-built adobe houses which must have cost the builders thousands of dollars. Many of these have been occupied under squatter titles by emigrants within the last few years. Of others, only the ruins remain, having been destroyed by the depredations of the Indians, or by the heavy rains of the succeeding years.

The greater portion of these lands on the Santa Cruz and San Pedro are covered by Mexican titles—and many of these again by squatter claims. It is absolutely necessary that Congress should by some wise and speedy legislation settle, upon some definite basis, the land titles of Arizona. Until this is done, disorder and anarchy will reign supreme over the country. The present condition of California is in a great degree to be attributed to the want of any title to the most valuable real property in the State, and the millions which have been spent in fruitless litigation should teach a lesson of great practical value. Let those Spanish grants and Mexican titles which have been occupied in good faith be affirmed in the most expeditious and economical manner to the claimants, and they will immediately pass into American hands, and become productive. The remainder of the country should then be thrown open to settlers. No better code of mining law exists than the Spanish, adopted in the Senate bill introduced by the late General Rusk, and passed at the last session of Congress. A judicious and liberal donation law, giving to the actual settler a homestead, and to the enterprising miner and "prospector" a fair security for the fruit of his labors, will at once make of Arizona a popular, thriving and wealthy State, affording new markets for the productions of our Atlantic States, and yielding annually millions in silver and copper.

In addition to the produce of Arizona, the immediate vicinity of the agricultural region of Sonora affords an abundant market for all necessary supplies, including sugar, which is manufactured by the Mexicans in great quantities from the cane. Guyamas, which one day will be ours, is one of the largest ports for the export of flour on the Pacific coast north of Chili. She also exports several millions in silver annually, which finds its way direct to the English market. Under an intelligent system, the Sonora mines would yield a hundred millions a year, and the supply is inexhaustible. If any reader doubts this statement, refer him to the statistics of Humboldt, Ward, and Wilson, most unquestioned and valuable authorities. Both Humboldt and Ward note the fact that the silver deposites grow richer as they are traced farther North. There can be no doubt that the most extensive and valuable mines, both of pure silver and silver mixed with copper and lead, are within the limits of Arizona.

The yield of the silver mines of Mexico, as computed by Ward and Humboldt from the actual official returns to the Government, from the conquest to 1803, amounts to the enormous sum of $2,027,955,000, or more than two BILLIONS Of dollars. Again, Ward says: "I am aware that many of the statements in this and the preceding books respecting the mineral riches of the North of New Spain, (Sonora, including the 'Gadsden Purchase,' Chihuahua, and Durango,) will be thought exaggerated. THEY ARE NOT SO; they will be confirmed by every future report, and in after years, the public, FAMILIARIZED WITH facts which are only questioned because they are new, will wonder at its present incredulity, and regret the loss of advantages which may not always be within its reach."