Daily Intelligencer

Pittsburgh Convention.

The senior editor of the Intelligencer not being at his post to-day, we take advantage of his absence to transfer to our columns, from the New York Post, the following notice of the recent great Republican Convention at Pittsburgh. The letter from which we make the extract, is evidently written by one well posted in the political affairs of the country, and his statements with regard to the result of the great struggle in the Old Keystone, may, therefore, be relied on:

Arrangements had been made for a considerable gathering; but the result has astonished everybody. The day dawned wet and cold, and the rain continued to fall till ten o'clock; but nothing could chill the ardor of the people. At an early hour they commenced pouring in from the country districts, in carriages, in wagons, on horseback, on foot and by every possible means of conveyance. The railroads and steamboats also brought in large delegations from adjacent counties, and from Virginia and Ohio. Our iron workers, artisans and laborers of all kinds turned out-almost to a man, and made a grand display. The procession formed in the city and marched to the Alleghany Commons, where four stands had been erected, from each of which speaking commenced at twelve o'clock.

Among the speakers were Hon. Thomas Corwin and Senator Wade, of Ohio, Morton McMichael, of the Philadelphia North American, Mr. Campbell, of the Wheeling Intelligencer, Mr. Armor, of Maryland, and Thomas Marshall, Esq., of this city.

The procession certainly presented the most imposing spectacle of the kind ever witnessed in this city. It was at least five miles in length, and was composed of the "bone and sinew of our population. Of the number present it would be idle to attempt anything like an accurate estimate. It was a "multitude which no man can number." No one talks of less than fifty thousand; but if with those who participated in the pageant we include all who came to see and hear, one shall be justified in suggesting one hundred thousand.

But I should have said that this splendid political carnival was opened last night by a grand torchlight procession of Wide Awakes. Three thousand torches blazed along our streets, presenting a scene soon to be forgotten. The most striking feature of this Spectacle was a delegation of Wide Awakes from Wheeling, Virginia. They numbered nearly three hundred men stalwart, resolute, brave-looking fellows, who looked as if they meant to vote without consulting the knight of the slave whip.

They were greeted with shouts of applause wherever they went. One of their number (Mr. Campbell) made a speech to-day at the Commons. He said he came there to assure the Republicans of Pennsylvania that they are not a sectional party. Their principles are taking fast hold in the South. They are as strong to-day in Virginia as the Bell, or Douglas, or Breckinridge party is in Virginia. "If," he added, "you Republicans of Pennsylvania elect Andrew G. Curtin Governor by a majority of 20,000, we shall be the first in power, and Lincoln and Hamlin will lead all competitors."

Mr. Campbell made an admirable speech, and it was received with tremendous cheers by the immense crowd.

Governor Corwin arrived at 3 o'clock and immediately commenced speaking to as many people as could get within hearing or seeing distance. For nearly three hours he kept the multitude on their feet, and retired amid cries of "Go on, go on!"

I shall attempt no report of the speech.- He is unreportable as his manner is inimitable.

But let me simply say that he paid his profound respects to Mr. Douglas; and can any man pass through Mr. Corwin's hands and live? Alas, I am compelled to announce that Douglas is no more! He is dead and buried. No more will he come into Pennsylvania crying "The tariff! the tariff! lo, how your interests have always been pushed out of Congress by this negro question! Make me President, and I'll give you a tariff!"

This great demonstration is decisive as to what Western Pennsylvania will do at the approaching election. General Moorhead, our present and next representative in Congress, and one of our most reliable calculators, stated in a speech the other day that Lincoln would carry this state by eighty thousand majority. But the General was then speaking at Braddock's Fields, the scene of General Braddock's defeat, and perhaps the place and its associations had some effect on his sanguine temperament.

But no man here pretends to doubt that Pennsylvania is sure for the Republican ticket by an overwhelming majority. The West will meet the East at the Alleghanies with twenty thousand which will there be augmented by twenty thousand more.

Tell your Democratic and fusion friends in New York and Washington to save their money. It will not pay to invest it here. They will never get it back.