Rumors have reached me that there is no very amicable feeling existing between the Americans and foreigners in the gold regions, and that the former are disposed to forcibly expel the latter from the placer districts. I shall soon visit the valleys of the Sacramento and San Joaquin, and hope to be able to report upon the true state of affairs there by the August steamer. As Congress has declined passing any laws restricting the working of the placers, I shall not deem myself authorized to interfere in this matter, any further than may be necessary to preserve the public tranquillity. Indeed there is much reason to believe that Congress has pursued the best policy, under the circumstances, in leaving the placers open to all; for it would be exceedingly difficult to enforce any regulations not absolutely required by the necessity of the case, and it is more than probable that any attempt at this time to rent out the mineral lands, or to tax their products, would involve a great expense, and it is quite possible that such an attempt would lead to very serious difficulties. Of the large numbers who have been attracted to this country by the flattering prospect of sudden wealth, and with the intention of returning to their former homes to enjoy their gains, many foreigners as well as Americans are becoming established in business, and will make California their permanent place of residence. It is therefore well worthy of serious consideration whether the present system may not prove equally beneficial with that of a more exclusive policy. It certainly conduces much towards developing the resources of the country, extending its commerce, and rapidly augmenting its wealth and population. As soon as I have made a personal examination of the gold regions, I shall be prepared to express my views on this subject; but I cannot omit the present occasion to urge upon the government the importance of establishing a mint in California, with the least possible delay.