Island) and a section of the Second Connecticut Battery at City Hall Park, to proceed this evening to the city of Troy, N. Y., and to report upon arrival there to Captain Charles Hughes, provost-marshal.

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By order of Brigadier-General Canby:

C. T. CHRISTENSEN,

Assistant Adjutant-General.

YORKTOWN, VA., August 31, 1863.

General NAGLEE,

Norfolk, Va.:

The cavalry will arrive here from Williamsburg this afternoon and start to-morrow. There seems a considerable force about Gloucester Court-House, but cannot get particulars. Have you any further instructions? Shall I send the cavalry direct, or land them at Dudley's Ferry and take enemy in rear? It is three hours from here by steamboat. I have 900 effective for the expedition.

I. J. WISTAR,

Brigadier-General.

CIRCULAR.] HEADQUARTERS ARMY OF THE POTOMAC,

August 31, 1863-10. 30 a. m.

The general commanding desires me to advise you that a movement will be made to-day on our left flank, which may result in some corresponding movement of the enemy and eventually involve other portions of the army. He therefore desires you to enjoin particular vigilance on all pickets and outposts, and that you hold your command in readiness for orders at short notice, as has been hitherto required of you.

A. A. HUMPHREYS,

Major-General, Chief of Staff.

(To commanders of the First, Third, Fifth, Sixth, Eleventh, and Twelfth Army Corps, and the Chief of Artillery.)

SPECIAL ORDERS,
HDQRS. ARMY OF THE POTOMAC, Numbers 234. August 31, 1863.

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8. The chief of artillery is authorized to exercise the power of a corps commander with respect to leaves of absence to officers on surgeon's certificates, discharges of soldiers on surgeon's certificate of disability, and transfer to the Invalid Corps under the general orders of the War Department governing that subject.

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By command of Major-General Meade:

S. WILLIAMS,
Assistant Adjutant-General.