Collingwood at Monterey, on the 6th of July, the grants to the Irish clergyman were not completed, and the American flag was already floating on every important post in the north of California. Seymour took Macnamara on board his ship, and thus the hopes of the British partizans were effectually blighted when the Admiral and his passenger sailed from the coast.
Commodore Stockton arrived at Monterey during this summer and Sloat returned to the United States, leaving the Commodore in command. Frémont and Gillespie, who were at the head of forces on shore determined to act under the orders of the naval commander, and Stockton immediately prepared for a military movement against the city of Los Angeles, where, he learned, that General Castro and the civil governor Pico had assembled six hundred men. Frémont and the Commodore, embarking their forces at Monterey, sailed for San Pedro and San Diego, where, landing their troops, they united and took possession of Los Angeles on the 13th of August. The public buildings, archives and property fell into their possession without bloodshed, for Castro, the commanding general, fled at their approach. Stockton issued a proclamation announcing these facts to the people on the 17th of August, and having instituted a government, directed elections, and required an oath of allegiance from the military. He appointed Frémont, military commandant and Gillespie, secretary. On the 28th of August he reported these proceedings to the government at Washington, by the messenger who was met by General Kearney, as we have already related, on his way from Santa Fé to the Pacific. Carson, the courier, apprised the General of the conquest of California, and was obliged by him to return as his guide, whilst a new messenger was despatched towards the east, with the missives, escorted by the residue of the troop which was deemed useless for further military efforts on the shores of the Pacific.