By reference to my journal it will be noticed that rain fell on us at intervals all the way from the opening of the Rio Grande valley until I came near to Fort Yuma. While the coast along the Pacific was, in September and October, parched with a drought, compelling rancheros to send their cattle into the mountains; our contractor was cutting hay to send over to our station on the desert. Lassator’s is twelve miles from the top of the coast range, which we there descend by a mule path for several miles on our way to Vallecito, though a good road can be made with a moderate amount of money. After crossing the desert, emigrants usually give their stock a run of the excellent grazing valleys in these mountains, before proceeding further on their journey. It is hardly possible for me to do more than sketch a few of the changes which our road has produced in the country through which we pass. The War Department uses the facilities offered by our line for a regular semi-monthly correspondence with seven military posts. Persons interested in mining pursuits are now looking with great interest towards the silver and copper mines of Arizona. Our mail not only carries the correspondence which takes the money to the mining parties, but regularly bring reports of their success, while passengers are, all the while, taking our line to Arizona; our stations afford stopping places, and our agents information to all who prefer their own mode of conveyance; such travellers are numerous. The newly appointed consul for Guyamas takes our stage as far as Tucson, starting from San Antonio, Texas. Our line is already forming the basis of a new State, rich in minerals, half way between Texas and California. Very respectfully, I. C. WOODS, _Superintendent S. A. & S. D. Mail Line_. Hon. A. V. BROWN, _Postmaster General_. Accompanying this please find the measurements from point to point on the whole road from San Antonio to San Diego, with names of the watering places. _Table of distances, and from one watering-place to another from starting point._