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.