WASHINGTON, D. C., Friday, April 22, 1864-noon.

Major General W. S. ROSECRANS,

Saint Louis, Mo.:

Have just heard of your dispatch. Am compelled to go to New York, where I will be detained three or four days, and may return here. Will my coming to Saint Louis some days hence be of any service? Answer here-Willard's.

W. DENNISON.

HEADQUARTERS DEPARTMENT OF THE MISSOURI,
Saint Louis, Mo., April 22, 1864.

Governor W. DENNISON,

Washington, D. C.:

The matter is one of national importance and must be confidential. Some days hence will probably do, but time is important.

W. S. ROSECRANS,

Major-General.

PILOT KNOB, April 22, 1864.

Lieutenant H. HANNAHS,

Acting Assistant Adjutant-General:

Scouts returned from Poplar Bluff, Doniphan, and below, on the 15th instant; from direction of Bloomfield the 20th instant; scout also returned yesterday from Reeves' Station and below. Scout west from Patterson returned to day. All report that guerrilla bands have gone below to join Kitchen and Reves.

J. F. TYLER,

Colonel, Commanding Post.

WARRENSBURG, MO., April 22, 1864.

Major-General ROSECRANS:

Missouri Republican, April 19, first page, fourth column, has an account of Paddy Mullins which is clearly proved by evidence forwarded to the headquarters. He belongs to Brownlow's band of 6 who infested Cooper County last summer, and on their return from the south a few weeks since robbed a store 2 miles north of Tipton. Two of the band, Brownlow and Cowall, were caught last year, tried by military commission, and sentenced to be shot, which was confirmed, but made their escape from the jail at Boonville. I have ordered Mullins to be shot on Saturday, the 23rd, at 4 p. m.

E. P. BROWN,

Brigadier-General.

HEADQUARTERS STATION,
Lexington, Mo., April 22, 1864.

Colonel JAMES McFERRAN:

COLONEL: I arrived here last night. Found all quiet with the exception of the citizen guards. They seem to be greatly excited over the shooting of Ewing. Some of them have gone out to guard him. He was not dead yet this morning. I have just heard that