is somewhat strengthened by the information drawn the prisoners taken yesterday that Maryland Heights will be taken by General Lee on his return without any fighting . This plan may succeed, if the rebels can capture Washington and Baltimore and hold Pennsylvania ; not otherwise. June 25. - As it was apparent from signal stations and also from prisoners captured that the enemy was moving toward Pennsylvania, a sharp lookout was kept, and during the day the following telegrams were sent:

Headquarters, Maryland Heights, June 25, 1863-11 a. m.

Major-General Halleck, Commander-in-Chief:

Two intelligent sergeants from the Ninth Alabama Regiment have just come in. They say they belong to A. P. Hill's corps, and that it is all on the Maryland side of the Potomac . They say Longstreet's corps is between Berryville and Charlestown, coming on. The officers and men captured yesterday and these deserters will be to sent to Baltimore today.

Dan. Tyler,

Brigadier -General.

Headquarters, Maryland Heights, June 25, 1863.

Major -General Hooker, Commanding Army of the Potomac:

A citizen reports that the rebel troops at Boonsborough are moving from there toward Emmitsburg. Dan. Tyler, Brigadier-General.

Headquarters, Maryland Heights, June 25, 1863-2 p. m.

Major -General Hooker, Commanding Army of the Potomac:

I am satisfied Ewell is at or beyond Hagerstown . A. P. Hill's corps is between Sharpsburg and Boonsborough, and Longstreet's corps is between Berryville and Shepherdstown. Three or four regiments have crossed at Shepherdstown Ford to-day. Two sergeants, deserters from A. P. Hill, report him last night at Sharpsburg.

Dan. Tyler,

Brigadier-General.

Headquarters, Maryland Heights, June 25, 1863-2 p. m.

Lieutenant Colonel Donn Piatt Chief of Staff:

Our 24-pounder howitzers all in position, but we require eight more to perfect our defenses . If possible, induce General Ripley to order them at once, with 160 rounds of assorted ammunition per gun If we are taken, it will be for want of these howitzers ; mark that . Will you sent me map of Harper's Ferry, which Colonel Raynolds says you have in the adjutant-general's office?

Dan. Tyler,

Brigadier -General.

Headquarters, Maryland Heights, June 25, 1863-4 p. m.

Major -General Hooker, Commanding Army of the Potomac:

That portion of the rebels by Boosborough are evidently taking the route by Emmitsburgh into Pennsylvania . A. P. Hill's corps passed Sharpsburg this a. m., direct for Hagerstown.

Dan. Tyler,

Brigadier-General.