TUESDAY, OCT. 13. Emigrants from the United States are still pouring into the rich valley of the Sacramento. A letter from one of them says:—“It may not be uninteresting to you to know that the emigrants by land the present season far exceed the expectation of the most sanguine. No less than two thousand are now in the interior, and within a hundred miles of the settlements. They bring with them a large amount of intelligence, wealth, and industry, all of which are greatly needed in their new home. The Mormons alone have a train of more than three hundred wagons.” These emigrants will change the face of California. We shall soon have not only the fruits of nature, but of human industry. We shall soon be able to get a ball of butter without churning it on the back of a wild colt; and a potatoe without weighing it as if it were a doubloon. Were it possible for a man to live without the trouble of drawing his breath, I should look for this pleasing phenomenon in California. WEDNESDAY, OCT. 14. The success of the insurgents at the south has emboldened the reckless here. Bands have been gathering in the vicinity to make a night assault on Monterey. Their plan is to capture or drive out the small American force here, and plunder the town. Those engaged in it are men of desperate fortunes. The streets to-day have been barricaded, and the true and trusty among the citizens have been formed into a night patrol. I sleep with my rifle at my bedside, and with two pistols under my pillow. My servant, who is a brave little fellow, is also armed to the teeth. He ought to be brave, for he was born in St. Helena, close to the tomb of Napoleon, and must have caught some fire from the hero’s ashes. My house has grated windows, and an entrance that is easily defended against odds, so that we shall probably make a pretty good fight of it. One thing is certain, neither of us go out alive. I will not be taken, tortured, and hacked to pieces, as two of our countrymen were a few months since. THURSDAY, OCT. 15. No assault yet; but a company of horsemen have been seen to-day crossing the southern plain, and winding off behind the hills at the west. They have, as a messenger informs us, joined another party much larger than their own, and are now encamped in the woods. The citizens here who have been true to our flag, feel deeply alarmed; and in truth they have some occasion, for if the town is sacked they will be among the first sufferers. I have sent an express to Com. Stockton, who is at San Francisco, where he has been engaged in raising and dispatching a heavy force for San Pedro. He will be here with the Congress as fast as the winds and waves can bring him.