_September 13._--To-day I despatched a party of our men with a wagon and saddle mules, under instructions to examine very carefully the mountain passes eastward of San Diego, that we might find, if possible, a better and shorter route for a road than the present circuitous one by way San Ysabel. The county surveyor very kindly accompanied our party, giving us the benefit of his experience; so also did one of the county supervisors, thus showing the great interest which the citizens of San Diego felt in the success of an overland mail. [Our party returned on the 18th, reporting having found a trail which, in their opinion, could be made an excellent road with a moderate outlay of labor.] _September 21._--To-day I despatched a messenger to San Francisco by the steamer, with instructions to make, as far as possible, all needful purchases of supplies for the western end of the line, and to bring them to San Diego by return steamer. I leave at the earliest possible moment to retrace my steps over the road, as I had promised to be back about October. _September 24._--I contracted to-day for hay and straw to supply stations we had made on the desert, at Vallecita and Carissa creeks. _September 29._--To-day I despatched a train, consisting of a coach and wagon, destined for our mail station at Maricopa wells; they were loaded with rations for the men who remain there permanently. _October 4._--Despatched a relay of ten mules over the mountains to meet and accompany the train of September 29. _October 6._--Steamer arrived from San Francisco this morning, having on board for us all the supplies our agent had been able to obtain. Commenced at once preparing for my return trip. _October 17._--To-day I despatched two coaches, with complete outfits of animals and other necessaries. One of the coaches is to run between Carissa creek and Fort Yuma; the other is to run between Fort Yuma and Maricopa wells. I despatched these coaches to-day in order to have them at their stations in readiness to take through any passengers for Arizona or San Antonio which might come from San Francisco by steamer of the 18th. We had advertised in the California papers that we were ready for passengers as follows: _Office of the San Antonio and San Diego Mail Line._--This line is now ready to ticket passengers through from San Francisco to New Orleans, _via_ San Diego, Fort Yuma, Tucson, Mesilla, Fort Filmore, El Paso, and San Antonio, as well as to all intermediate stations. Also to Santa Fé and Albuquerque, (New Mexico.) For rates of passage, and further information, apply at the office of the company, Kearny street, (opposite Plaza.) C. McLAUGHIN, _Agent_. R. E. DOYLE, _Superintendent Western Division_.