JULY 25, 1864.-5 p.m.

Captain FISHER:

Parties of enemy are busy upon line of works to left of Gregory's house and west of plank road. This is the same line as was begun about fifteen days ago. They are engaged in extending the line to our right as well as upon the old portion. The bank thrown up is already very high.

I. S. LYON,

Signal Officer.

WALTHALL HOUSE, July 25, 1864-5 p.m.

Captain NORTON,

Chief Signal Officer:

One of the enemy's signal officers reports increase of tents at Cobb's. The enemy has occupied rifle-pits on a hill three miles northwest from here; they show a large number of tents.

CHAS. L. DAVIS,

Captain and Signal Officer.

[Indorsement.]

Respectfully forwarded for information of commanding general.

L. B. NORTON,

Captain and Chief Signal Officer.

JULY 25, 1864-5 p.m.

Captain FISHER:

A few rebels are engaged on the second line of works to west of plank road. In other directions all quiet.

I. S. LYON,

Lieutenant and Signal Officer.

JORDAN HOUSE SIGNAL STATION,

July 25, 1864-5.30 p.m.

Captain B. F. FISHER,

Chief Signal Officer, Army of the Potomac:

The enemy have occupied a portion of their earth-works north-northwest from this station, and about three-quarters of a mile westerly from Fort Clifton.

[Intercepted message:]

11.20 A. M.

Colonel BRENT,

Assistant Adjutant-General:

The enemy show an increase of camps to our left of Cobb's. One gun-boat off Point of Rocks and one off Port Walthall.

OPERATOR.

(Same to A. B.)

T. R. CLARK,

Captain.