A letter dated Camargo, Aug. IA, saws:
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An American arrived in town to-day from
Monterey, who, am told, reports that there
are 1000 rancheros and regulars 1000 regu-
lars) collected at that place already. Many OF
this force are from the Rio Grande. They speak
confidently whipping our army. 1t is ru-
mored about the camp, too, that Capt. Duncan,
who left here day before yesterday, to recon-
noitre some 80 leagues distant, was yesterday
on Canales's trail, with fair prospect Of over
taking him.


Gen. Twiggs was to have left Matamoras
yesterday, with the remainder of the troops that
are destined for Monterey. On his arrival here
it is believed that new organization of brig
AIDES will take place. ....


Another letter dated the 18th, from the same
place, says:


Since my letter of yesterday, have learned
that soon after McCullochs party left China,
some weeks ago, Mexican named Savrego,
raised four or five hundred men and started off,
as he told the people there, in pursuit. He was
careful, however, not to overtake the Rangers,
but learning that our troops were leaving Mata-
moras, and thinking that none were left to de-
fend the place, made up his mind to retake it,
but unfortunately for his plan, he soon found
that certain Col Hays was there. They have
it here that the Colonel met him and gave his
men drubbng, in true Texan style, but this
is probably nothing more than camp rumor.


The Texan infantry are to be disbanded to-
day OF tomorrow, and will nearly all return
home. They we're six months men.


P. S.-SatTday Erening. In addition 10
the report given above, written this morning,
will state what have since heard from gen
lleman well informed on the subjects therein
alluded to.


A man has arrived from Monterey, who
states that from the number Of troops there,
and the feeling of the inhabitants, it would be
imprudent for Gen. Taylor to move upou that
place with less than 10000 we'll disciplined
men.


Savriego, who mentioned as having threat
ened to cut McCulloch's party to pieces, and
to take all Matam ras, is noted robber.
only hope he may fall into the hands of the
ed from here the other day, under Capt. Dun
can, left McCulloch sick at Mier. He las re-
covered. The party went on in the direction
of Jerama.


The I'd regiment Of Texan mounted men,
under Col Woods, came up this morning, and
a regiment Ohio volunteers have Just arrived,
on board the steamer Reborts. The Louisville
Legion encamped below town last evening,
hear Of very little sickness among the men who
have arrived.


The army will probably movo on to Monte
rey by two separate routes, clearing the conn
try for a considerable extent on either side and
between the two roads


The laumdresses, or camp women, at this
point will be sent back TO Matamoras early
next week-a pretty sure sign we shall soon be
on the march.


Another letter from Camargo, dated August
ii, complains of the extraordinary heat, but
says the health of the troops is good. There
are now about 900 volunteers and 3,000re-
gulars on the Rio Grande. The letter adds:


The great camp below the town is already
over mile long, the line of tents averaging
about twelve deep. | saw nearly all the troops
out, this evening, drilling in battaons. The
4th artillery were drilling as infantry, likewise
all the artillery except the light. A portion of
the 4th armed with muskets with pel cussion
locks, and it is easy to distinguish them from
the rest when the battalion goes through the
exercise of loading and firing. This regiment
is about 500 strong, and is commanded by Col.
Child, a most efficient and gallant officer The
Sd infantry is said 10 be the finest in its ap-
pointments, although small in numbers, of any
in the army. It's neatness is proverbal, every
musket looking ike FURNISHED silver, and every
article of their accoutrements corresponding
Col. Hitchcock, who is, unfortunately for the
service, sick and absent, belongs to this corps.


The marching will hereafter be principally
done at night. should like to be able TO go
on with Gen. Worth's command, which will
start in advance next week. | should pity the
Mexican army that would have the temeritY to
meet this brave officer in the field, for he is de-
termined to do something brilliant, at all haz-
ards.


LATER FROM YUcATAN-.4nother Outbreak
The Picayune has advices from Merida and
Campeachy to the 9Th ult. There had been an
outbreak at Valladolid, ,incted by an individual
anxious to gain the seat occupied by Governor
Barbachano


The griio or popular cry of the sedition was
'Down with the Taxes" The insurgents OBJ
tanned possession Of the quarters other troops,
seized their arms, and were fortfyng their po-
stion, but abandoned it straightway upon
learning of the approach of Col Gamboa at the
head of 200 troops. They instantly retreated
to Tixhuaactum, two leagues distant from
ValIadolid. There being called upon to sur
render, they quietly laid down their arms, s,wth-
out gun being fired, and the leaders Of this