On the third day after the army had moved from its ground, Colonel Washington was seized with a violent fever, which disabled him from riding on horseback, and was conveyed in a covered wagon. General Braddock, who found the difficulties of the march greater than had been expected, continuing to consult him privately, he strenuously urged that officer to leave his heavy artillery and baggage with the rear division of the army; and with a chosen body of troops and some pieces of light artillery, to press forward with the utmost expedition to fort Du Quesne. In support of this advice, he stated that the French were then weak on the Ohio, but hourly expected reinforcements. During the excessive drought which prevailed at that time, these could not arrive; because the river Le Boeuf, on which their supplies must be brought to Venango, did not then afford a sufficient quantity of water for the purpose. A rapid movement therefore might enable him to carry the fort, before the arrival of the expected aid; but if this measure should not be adopted, such were the delays attendant on the march of the whole army, that rains sufficient to raise the waters might reasonably be expected, and the whole force of the French would probably be collected for their reception; a circumstance which would render the success of the expedition doubtful. This advice according well with the temper of the commander-in-chief, it was determined in a council of war, held at the Little Meadows, that twelve hundred select men, to be commanded by General Braddock in person, should advance with the utmost expedition against fort Du Quesne. Colonel Dunbar was to remain with the residue of the two regiments, and all the heavy baggage. {June 19.} Although this select corps commenced its march with only thirty carriages, including ammunition wagons, the hopes which had been entertained of the celerity of its movements were not fulfilled. "I found," said Colonel Washington, in a letter to his brother, written during the march, "that instead of pushing on with vigour, without regarding a little rough road, they were halting to level every mole-hill, and to erect bridges over every brook." By these means they employed four days in reaching the great crossings of the Yohiogany, only nineteen miles from the Little Meadows. Colonel Washington was obliged to stop at that place;--the physician having declared that his life would be endangered by continuing with the army. He obeyed, with reluctance, the positive orders of the general to remain at this camp, under the protection of a small guard, until the arrival of Colonel Dunbar; having first received a promise that means should be used to bring him up with the army before it reached fort Du Quesne. {July 8.} The day before the action of the Monongahela he rejoined the general in a covered wagon; and, though weak, entered on the duties of his station.