REBEL ARMY IN MARYLAND.
THEIR TRAINS STILL CROSSING THE RIVER.
Gens. Lee, Jackson, Hill Stewart and others in command.
ACQUIA CREEK EVACUATED.
No more arrests to be made except by special orders — No more passes required to travel — Items of news from rebeldom — More details of the old fight — Gen'l Fryor captured and escaped — California election — Union and republican ticket elected.
WASHINGTON, Sept. 7. — From one of the Times correspondents, who has just returned from Poolesville, we learn that on Thursday night the rebels began to cross with cavalry, at or near the mouth of the Monocacy. They brought over two regiments of cavalry, and threw over a pontoon bridge and crossed with artillery, and threw out pickets towards Poolesville.
On Friday, about 1 o'clock, a column commenced to cross, of infantry and artillery. — They were crossing in three places besides the bridge — the water being up to a man's waist.
No resistance was offered to their crossing. Some cavalry who were watching them were attacked and chased to Poolesville. Their houses were closed and the streets blockaded by the citizens.
The farmers fired upon our flying cavalry as they passed.
About dusk Gen. Lee rode into Poolesville at the head of four regiments of infantry, and guided by a farmer, who had been professedly a union man.
Their infantry filed off to the left toward Fredericksburg.
The rebel Genls. Lee, Hill, Stewart and F. H. Lee are with the main body.
Their wagon trains were crossing on Saturday and Sunday morning.
The farmers are bringing hay and provisions of all kinds, and giving them away.
There is not a loyal man, with but one or two exceptions, there. The women received them with flags and tones of joy.
Sunday, 11 a.m. — The following account has just been received from the Upper Potomac, and is believed to be reliable:
The rebel force in the neighborhood of Darnestown and Clarksburg is estimated at 30,000, composed of cavalry.
A body of the enemy, 1500 strong, crossed the river last night at White's ferry, and are supposed to be en route for Frederick.
Our forces hold the bridge on Seneck creek, which was not injured by the rebels on their return from Darnestown.
It has been ascertained that Jackson crossed the Potomac opposite the bank of the Monocacy, and passed along the bank of the stream to Frederick.
A rebel picket captured near Clarksburg to-day says Jackson's force is 45,000.
Hon. Henry Lane, of Ind., and Garrett Davis, of Ky., are here to obtain certain changes in the conduct of the war in the west.
Advices from Gainesville state that the rebel general, A. P. Hill, arrived about 2 1/2 miles beyond Bull Run, day before yesterday, with 35,000 men from Richmond.
A division under Gen. Walker, left Gainesville for Leesburg.
My information saw Jackson, Longstreet and Hill at Gainesville, and counted 44 pcs of artillery, mostly rifled guns — none larger than 12 pounders.
At Centreville he saw a few cavalry only and a battery which was returning from having, as they said, driven the Yankees away from Munson's hill.
One of the Times' correspondents left Fairfax C. H. at 4 o'clock this morning.
Our pickets are within 4 miles of that place.
The enemy's pickets seem to be within a mile of Fairfax in a semi-circular shape on the southwest.