In South Carolina a large meeting was held at Charleston, on the 28th of August, in favor of co-operation between the slaveholding states, and opposed to separate State Action for the purpose of resistance to the National Government. John Rutledge presided, and in the list of other officers we find the names of many of the most distinguished citizens of the State. Our advices from California, to the 14th of August, are of a favorable character. In San Francisco business is active in spite of the effects of the recent conflagration, and the administration of justice is placed on a more substantial basis. Great activity prevails in the mining districts, and the work of constructing canals on various gold-bearing streams is vigorously advancing. Accounts from Utah represent the new territory in a prosperous condition, with the exception of some slight Indian difficulties. The crops are unusually fine. The emigrants for Salt Lake and Oregon are progressing prosperously. The Mormons have extended their settlements along the base of the mountains, northward, and facing the Great Salt Lake, ninety miles, nearly to Bear River ferry. They are fast taking up all the good land in the Valley, and are engaged in building a railroad to the mountain, some seven or eight miles, on which to transport the materials for their great temple. Dr. John M. Bernhisel has been chosen Territorial Delegate to Congress. It has been stated that the Survey of the Mexican Boundary Commission was progressing rapidly westward. The astronomers and surveyors of the American and Mexican Commissioners had joined forces, and their advanced parties had reached a point thirty miles west of Rio Mienlies. The line was to run eight or ten miles south of Cooks Spring, thus giving the United States the whole of the road to the Copper Mines, and the only route which can be traversed by wagons. We have later intelligence, that in consequence of a disagreement between the Commissioners and the Surveyor, the operations of the Commission are almost suspended.