The Express.
London, England, 1862-08-25 00:00:00

AMERICA.

The Royal Mail 110 TOW steamer imaralasian,
which sailed from New York on the 13th inst., and
called at Queenstown yesterday to laud mails and
passengers, arrived in the Mersey shortly before 11
o'clock this morning.

A telegraphic summary of her news has already
been published.

The New York Herald of the 13th says :
General Popereporte to General Halleck that Jackson's
rebel forms retreated under °over of Monday night actors
the Rapidan river, that the rebel rearguard was crossing
the river towards Orange Court-house yesterday morning, '
and further, that the Union cavalry and artillery were in •
pursuit. It is plain from the result of the action, that
General Jackson's forces must have suffered severely. The
prisoners report that their own troops were mowed down
like grass, and that they were three times heavily reinforced.
Over 20,000 of the rebels took part in the action, but only
two divisions of General Banks s army were engaged. A
telegram, dated Culpepper Court House, Virginia, dated
evening of the 12th, says :
"The battle of Saturday, the 9th, is one of the most
important of the war, not merely on account of the dea-
-1 perate valour and unfaltering discipline displayed by our
troops, the obstinacy of the contest, and the heavy lots on
both sides, but because of its important effect on the cam-
paign of which it makes a part."
The campaign on the part of Jackson is. an attempt to
penetrate and recover the valley of the Shenandoah, whence
the richest supplies of the enemy are drawn, and the pane-
sion of which was of • practial importance, in the endea-
vour to bold Virginia as • part of the attempted Confe-
deracy, hardly to be estimated. At the same time the rebel
leaden hoped by this movement to so threaten Wash.
ington and Maryland sa to relieve Richmond and
withdraw our armies to the line o/ the Poto-
mac. To escort such objects as theee, and know-
ing that the government was now relatively weaker
and the rebellion stronger than could again occur in the
war, the Richmond leaders sent the flower of the. Southern
infantry under their most popular and enterprising gene-
rals, a large body of cavalry under their most distinguished
cavalry officer, Major-General Stuart, and an abundance of
artillery.
When Jackson had arrived with his forces as far as
Louie, Court-house and Gerdoesville, and found the dispo-
sition of General Pope's troops such that not only his pur-
pose to enter the valley was foiled, but his own direct com-
munications with Richmond were interrupted, he called
for further reinforcements, and with those, which were
freely furnished, attempted to stem General Pope's further
IItiVaDCS upon that railroad, the destruotion, or even the per-
manently threatening on which must bar from Richmond
all hope of the material or political control of Central
Virginia. Jackson attempted by a feint upon Madison
Court-house and Sperryville ter detain our force at the latter
point, whitest the same time hsthrew the mass of his forces,
numbering 35,000 men, by way of Orange Courthouse. upon
us at Cidpeppar, super:din to Wooly a portion of our forces
there, which be could overwhelm, and then march on
Sperryville from Culpepper, and crush the army corps of
Sigel. His plans were completely foiled by the rapid con-
centration of our forms at Culpepper, and their advance to
meet him at Cedar Run. The cool and determined temper
of Banks accepted the proffered battle as soon as offered,
and the battle of Saturday afternoon was fought between
the advance of Jackson, under himself and Ewell. After
endeavouring in vain to rout and drive Banks' corps, Jack-
son found himself compelled at night, by the rapid move-
' merits in front of him, to fall back to a strong defensive
position in Cedar Mountain • and finding Lis line of retreat
growing insecure, in the sue:reeding night he retreated alto-
gether, retiring beyond Robertson's river, and again beyond
the Rapidan. The result is, Jackson is agars foiled, and
forced to abandon his operadons„ ax .d his prestige is seri-
ously impaired. He will be rapidly followed.
The following is General Pope's official report :
Cedar Mountain, Virginia, August 12.

'o Major-General Hanook.

The enemy has retreated under emsr of the eight. His
rearguard are now crossing the Rapidaa towards Orange
Court-house. Our cavalry and artillery are is pursuit.
Joss Poi% Major-General.
The following Southern telegrams give the details
of the reported capture of Baton Rouge and the
destruction of the ram Arkansas. A special
despatch to the Mobile Advertiser and Register,
dated Jackson, the Bth, aaya :
General VDU Dora permits me to copy the following
despatches:

" Amite River, August 6.
"Abut one o'clock this morning the Federal gunboats
attacked the Confederate tarn Arkansas. Messengers in-
form nm that she fought them well for some time, inflict-
ing great damage. She was thee blown up by her crew.
The messenger thinks they all escaped.
" Jong C. BMW:NUDGE."
" Collette River, 10 miles from Baton Route,
August 6, 1862.
" We occupied the whole of the town and the battle field
till evening; but no decisive result was pined after my last
despatch. There being no water between here and the
Mississippi river compelled me to come here. I moved at
my own time, and in order. The Arkansas laid, with her
machinery injured, 50 miles above the town all day yester-
day. Her commander sent me word last evening that he
would try to get her up the river, and asked if it be possible
to send him a beet to aid him. From the reports she is
permanently unserviceable. We burned nearly all of their
camps and a large amount of storm, and cut them up
badly, General Williams and other prominent officers are
killed. " J. C. SRECKWIRDXI6."

Rumour ears that densralelarke is a prisoner. Parties
from the field say that oar victory was complete. The
ground was strewed with the dead and wounded.

The Richmo,ki Whig of the 9th August says :
The Confederate sloop of war, Arkansas, Lieut. B. K.
Steven, of South Carolina, commanding, left Vicksburg
on Monday to co-operate in the attack on Baton Rouge.
After pining Bayou Sara some portion of her machinery
became disabled, and she was hauled in toward, the shore
for repairs. Whilst is this position she was attacked by
• fleet of Yankee gunboats from below. After a gallant re-
sistance she was abandoned and blown up. The officers and
crew, we are informed, reached the shore in safety.

A San Francisco telegram of the 7th inst. says,
that owing to the shelving beach and the heavy surf
there was little probability of saving the treasure
from the wreck of the steamer Golden Gate. An-
other despatch, of the 9th, says that the steamer
Active had been chartered to visit the wreck, and
to endeavour to recover the gold.
Dr. Charles Mackay writes as follows to the New
York Times :

You date in your paper of Sunday that I have denied
being the writer of the New York correspondence of the
London Times. You have been misinformed. I never
made any such denial to any person, authorised or unau-
thorised to ask the question. &ore my snivel in America
I have neither taken pains to promulgate, nor to conceal •
fact that has ceased for many months to be • secret on either
side of the Atlantic.—l am, air, your obedient servant,
CHAS. MACKAY.
New York Hotel, Tuesday, August 12. 1862.

A telegram from Toronto says that there was an
extraordinary number of Americana in that city,
to escape being drafted. Advice* from some
of the frontier towns in the United States mention
that large numbers had been intercepted in their
intended flight into Canada.
The British steamer Won*, from Hull, with a
full cargo, arrived at Port Royal on the 7th inst.,
a prise to the United States steamer Unadilla. She
was from England direct, and was taken while
attempting to run into Cashew Sound.
Yellow fever bad made its appearance at Key
West, and the Federal steamer San Jacinto, which
had arrived from that place at Boston, had thirty
ogees of the disease among her crew.