From the St. Louis Republican of August 21.
NEWS FROM THE SANTA FE EXPEDITION.—An Express from Gen. Kearney's camp, at Bent's Fort, arrived at Fort Leavenworth on the 14th instant. The express left Gen. Kearney on the 19th of July.
General Kearney, with his command, con-sisting of several companies of U. S. Dragoons, the 1st regiment of Missouri Volunteers, under Colonel Donaphin and the battalion of Volun-teer Artillery, under Major Clark, set out from Bent's Fort for Santa Fe, on the 1st day of Au-gust. The troops were all in excellent health and spirits—there had been but one death up to the time the express left. A short time before the express left, Captain Moore, of the U. S. Dragoons, captured three spies, who had been sent out from Santa Fe, to ascertain the character, extent, &c. of the U. S. force. After their capture and their purpose was ascertained, by the orders of Gen. Kearney, they were shown all over the army, and after they had seen every thing, they were dismissed and permitted to return to Santa Fe.
From these men, and also from other sources it had been ascertained satisfactorily that there would be no resistance made to Gen. Kearney's taking possession of Santa Fe. In fact, it is said, that the Mexicans were anxiously await-ing the arrival of the army, believing that it would furnish them a harvest in the way of trade, and protection from the troublesome In-dians in their vicinity. There were no troops at Santa Fe, nor in the upper provinces, and none were expected.
Gov. Armijo had issued a proclamation, in which he states that the existing hostilities be-tween the United States and Mexico will not interrupt the trade between the United States and Santa Fe. That in all respects, it shall be conducted as if the war did not exist. This, of itself, is a sufficient indication that Gov. Armijo does not intend to offer resistance to Gen. Kear-ney.
It is said that General Kearney will stop at Santa Fe until Colonel Price's Regiment ar-rives there. That, upon their arrival, that Reg-iment, or a portion of it, will be left to oc-cupy Santa Fe and other important points in the vicinity, and General Kearney, with the residue of the force, will proceed immediately to California.
The five hundred Mormon Infantry, under the command of Lieutenant Colonel Allen, were progressing rapidly. It was believed they would reach Bent's Fort nearly as soon as Col. Price's regiment