The Marquis of PALMELLA arrived at Oporto on the 1st
instant, 32' company with Captain NAPIER, and about six hundred troops, principally Poles. It is expected that Don PEDRO'S affairs will be bald:Red by PALMELLA'S arrival, as he appears to be the only Portuguese in his service on whose honour the least reliance can be placed. He is said to possess much influence in the country ; and as long as he is minister, hopes may be entertained of the defection of some of his brother nobles from Don MIGUEL. It is said that the Constitutionalists do not muster more than nine thou- sand effective troops : all attempts, therefore, to reach Lisbon, must be extremely rash, unless the rising of the people of the interior can be relied upon; and of their disposition to take Don PaDRO'S side in the quarrel, we have seen no evidence as yet.