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Extract of a letter from an Officer in the Army, dated Cantonment Leavenworth, (32O miles above St. Louis, Missouri,) 10th March, 1881, to gentle man in Philadelphia.

 Yesterday an express arrived from the Bluffs, bringing information that Mir Vandeberg's party was attacked by the Black Feet Indians, on the Madison Fork of the Missouri The Indians attacked them in camp, at the dawn of light in the morning, and fought all day. At dark the Indians withdrew and left forty killed and number of horses the wound ed not known, as they carried off; but from the appearance of blood supposed to be a number. MT Vanderberg had one killed and two wounded. This information was received through MT M'kenzie, who is at the Mandan villages No further news from Upper Missouri was received of any impor- tance."-Nnt Gaz