There is a large bridge of timber across the Alleghany and another over the Monongahela; the former of which leads to the town of Alleghany, a rapidly increasing village, situated on a beautiful plain on the western side of the river. About half a mile above the bridge the Alleghany is crossed by an aqueduct bringing over the canal, which (strange to say) comes down from the confluence of the Kiskeminetas with the Alleghany on the _western_ side of the latter river. The aqueduct is an enormous wooden trough with a roof, hanging from seven arches of timber, supported by six stone piers and two abutments. The canal then passes through the town and under Grant's hill through a tunnel, and communicates by a lock with the Monongahela. The field of battle on which the conceited Braddock paid with his life the penalty of obstinate rashness, is not far from Pittsburgh, and is interesting to Americans as the scene on which the youthful Washington displayed the germs of those exalted qualities which afterwards ripened into the hero, and made him the founder and father of a nation. Pittsburgh is destined to be the centre of an immense commerce, both in its own products and those of distant countries. Its annual exports at present probably exceed 25,000 and its imports 20,000 tons. Its trade in timber amounts to more than six millions of feet. The inexhaustible supply of coal and the facility of obtaining iron, insure the permanent success of its manufactories. Pittsburgh makes steam engines and other machinery, and her extensive glassworks have long been in profitable operation. There are also extensive paper mills moved by steam, and a manufactory of crackers (not explosive but edible) wrought by the same power. These crackers are made of good flour and pure water, and are fair and enticing to the eye of hunger, but we do not find the flavor so agreeable to the palate as that of Wattson's water crackers. Perhaps they are _kneaded_ by the iron hands of a steam engine, whereas hands of flesh are _needed_ to make good crackers. New Yorkers and people from down east, who wish to visit the Virginia Springs, cannot take an easier and more delightful route, than that through Pennsylvania to Pittsburg, and thence down the Ohio to Guyandotte; whence to the White Sulphur the distance is one hundred and sixty miles over a good road, through a romantic country, and by a line of good stage coaches.