The four points on the Po given in this dispatch will give the general direction of that river. From all the information given by our pickets left behind this morning the enemy evacuated their works in our front before we left this morning.

A. E. BURNSIDE,

Major-General.

MAY 19, 1864. (Received 4.15 p.m.)

Major-General BURNSIDE,

Commanding Ninth Army Corps:

Can you not occupy the Quesenberry house with a brigade? It will be a good point from which to observe the movements of the enemy.

U. S. GRANT,

Lieutenant-General.

HEADQUARTERS NINTH ARMY CORPS,
May 19, 1864-4.30 p.m.

Lieutenant-General GRANT:

I had one brigade at the Quesenberry house, but withdrew it. Will have it replaced at once.

A. E. BURNSIDE,

Major-General.

MAY 19, 1864.

Major-General BURNSIDE, Ninth Army Corps:

After occupying the Quesenberry house, push picket out to the Po River, if you can, and drive in the rebel pickets until you find the end or right of the enemy's main line. You want to get, if possible, where their movements can be observed, and if they move away, we want to follow close upon them. Push pickets also good distances on the roads east and southeast from you.

U. S. GRANT,

Lieutenant-General.

BURNSIDE'S HEADQUARTERS,

May 19, 1864-5.55 p.m.

General HUMPHREYS:

What was the result of the attack?

A. E. BURNSIDE,

Major-General.

HEADQUARTERS ARMY OF THE POTOMAC,
May 19, 1864-6 p.m.

Major-General BURNSIDE:

The firing has ceased. We have no report yet of the result. They attacked with strength enough to drive in the force there until it was re-enforced. I will let you know as soon as we learn what has taken place.

A. A. HUMPHREYS,

Major-General and Chief of Staff.