A mercantile despatch, received yesterday in the City, from Con-
stantinople, brought letters dated the 19th March, which state that IBRAIfAM PACHA had agreed to retrograde, in consequence of a conven- tion concluded with him upon terms which were to form the basis of a treaty of peace between his father and the Porte. The particulars are not given ; and as this report is directly at variance with the accounts received from the Pacha himself, we think it ought to be viewed with considerable distrust. It is almost certain that such reports would be disseminate' in Constantinople, in order to quiet the minds of the people, at the present time.
Up to a late hour this evening, no information of the sort had been received by our Government, or at either of the Embassies.