LEXINGTON, KY., August 12, 1864.

Major General S. P. HEINTZELMAN

Columbus, Ohio:

I have reliable information that four rebel officers named Fletcher, Williams Howard, and Mills, have gone to Chicago to plot for the escape of prisoners from Camp Douglas. They are stopping at the Briggs House or Bates House.

S. G. BURBRIDGE,

Brevet Major-General, Commanding.

LEXINGTON, KY., August 12, 1864.

Brigadier General HUGH EWING,

Louisville, Ky.:

Orders to General Hobson to move were sent him on the 10th. He will be telegraphed to hurry.

J. BATES DICKSON,

Captain and Assistant Adjutant-General.

LEXINGTON, KY., August 12, 1864.

General H. B. CARRINGTON,

Indianapolis, Ind.:

General Hobson is moving with adequate force against the rebels WEST of the Louisville and Nashville Railroad.

S. G. BURBRIDGE,

Brevet Major-General, Commanding.

OFFICE OF U. S. ENGINEERS, DIST. OF Kentucky,

U. S. ENGINEER AGENCY, ARMIES OF THE WEST,

Cincinnati, Ohio, August 12, 1864.

Brigadier General RICHARD DELAFIELD,

Chief Engineer, U. S. Army, Washington, D. C.:

GENERAL: I have the honor, agreeably to circular of July 29, to present the following report of operations during the month of July:

As engineer agent for the Armies of the West, besides furnishing supplies to the DIVISION of the Mississippi, chiefly to the Army of the Cumberland, I constructed and forwarded to Captain J. B. Wheeler, chief engineer Seventh Army Corps, at Little Rock, Ark., one canvas pontoon train of twenty-five boats, complete with all the necessary equipage, including rigging, wagons, harness, forge, carpenter's black-smiths', saddlers', and wheelwright's chests, of tools, constructed balks, excepting only plain balks and chess, which Captain Wheeler wrote me he could provide. As engineer officer in charge of the fortifications in Kentucky, I have furnished commanding officers concerned with maps of the surveys, made under my direction, of the defenses of Louisville and Nashville road at the following points: At Shepherdsville crossing of Salt River, at crossing of Rolling Fork near Lebanon Junction at Muldraugh's Hill near Colesburg, at Munfordville, at Bowling Green, and at Glasgow. A survey of Camp Nelson has been made, which I hope