In a letter dated Pittsburgh, August 1759, Col. Mercer writes to Gov. Denny: "Capt. Gordon, chief engineer, has arrived with most of the artificers, but does not fix the spot for constructing the Fort till the general comes up. We are preparing the materials for building with what expedition so few men are capable of." There was no attempt made to restore the old fortifications, but about a year afterwards work was begun on a new fort. Gen. John Stanwix, who succeeded Gen. Forbes, is said to have been a man of high military standing, with a liberal and generous spirit. In 1760, he appeared on the Ohio at the head of an army, and with full power to build a large fort where Fort Duquesne had stood. The exact date of his arrival and the day when work was commenced is not known, but the work must have been begun the last of August or the first of September, 1759. A letter dated September 24, 1759, gives the following account: "It is now near a month since the army has been employed in erecting a most formidable fortification, such a one as will to latest posterity secure the British Empire on the Ohio. There is no need to enumerate the abilities of the chief engineer nor the spirit shown by the troops in executing the important task; the fort will soon be a lasting monument of both." The fort was built near the point where the Allegheny and Monongahela unite their waters, but a little farther inland than the site of Fort Duquesne. It stood on the present site of the Duquesne Freight Station, while all the ground from the Point to Third Street and from Liberty Street to the Allegheny River was enclosed in a stockade and surrounded by a moat. It was a solid and substantial building, constructed at an enormous expense to the English Government.[C] It was five-sided, two sides facing the land of brick, the others stockade. The earth around was thrown up so all was enclosed by a rampart of earth, supported on the land side by a perpendicular wall of brick; on the other sides a line of pickets was fixed on the outside of the slope, and a moat encompassed the entire work. Casemates, barracks and store houses were completed for a garrison of one thousand men and officers, and eighteen pieces of artillery mounted on the bastions. This strong fortification was thought to establish the British dominion of the Ohio. The exact date of its completion is not known, but on March 21, 1760, Maj. Gen. Stanwix, having finished his work, set out on his return journey to Philadelphia. Conspiracy of Pontiac and Col. Bouquet.