Alexandria Gazette, Commercial And Political

By Last Night's Mail.

New-York, July 18.

From the Boston Palladium of Friday last.

IMPORTANT

The following letter was received by last night's Eastern Stage.

"I have this moment conversed with a gentleman from Eastport. He states, that a frigate arrived at Halifax on the 5th July, in about 20 days from England, bringing accounts that our Commissioners had been met at Gothenburg, by those appointed by Great Britain; that the gentleman came out in the frigate with despatches for Quebec, which were said to contain accounts of the conclusion of an Armistice between this country and England--That this gentleman left Halifax for Quebec in an hour after his arrival; and that it was generally expected that Peace would be ratified by that time."

The gentleman from Eastport who communicated the above information, arrived in town last night, and agrees in the correctness of the statement. He left Eastport on the 7th inst. when no Halifax papers had been received sufficiently late to furnish the news, but a number of letters came for this place, the contents of which may give some further information on this subject.

The Express for Canada had passed through St. Johns; where the messenger repeated that this news was pacific, and his belief that a treaty of peace had been signed by that time.

Transports had arrived at Halifax from France, with about 12,000 troops for Wellington's army; but this was not considered decisive proof of an intention to persevere in the war, as it was understood Great Britain intended to keep up her peace establishments in her colonies.

No prizes had been mentioned as recently carried into Halifax.

We have given the above interesting article, from the Boston Palladium, as we received it; and if it is true, it is highly important indeed; but, we (the Editors of the Mercantile Advertiser,) lament to say, that in our opinion, it wants confirmation.