We have an express to-day from Governor Johnson, Captain Nicholson, and several other gentlemen, with an account that the fleet, to the number of two hundred and sixty-three sail, have gone up towards the head of Chesapeake Bay. They lie over against the shore between the river Sassafras and the river Elk. We have also a letter from General Washington, acquainting us that to-morrow morning at seven o'clock he shall march his army through the city of Philadelphia, along Front Street, and then turn up Chestnut Street in his way to cross over the bridge at Schuylkill River; so that General Howe will have a grand Continental army to oppose him, in very good season, aided by a formidable collection of militia. I like this movement of the General through the city. Such a show of artillery, wagons, light horse, and infantry, which takes up a line of nine or ten miles upon their march, and will not be less than five or six hours passing through the town, will make a good impression upon the minds of the timorous Whigs for their confirmation; upon the cunning Quakers for their restraint; and upon the rascally Tories for their confusion. I think there is a reasonable ground for confidence, with the favor of Heaven, that Howe will not be able to reach this city. Yet I really doubt whether it would not be more for our interest that he should come here, and get possession of the town. 1. Because there are impurities here which will never be so soon or so fully purged away as by that fire of affliction which Howe enkindles wherever he goes. 2. Because it would employ nearly the whole of his force to keep possession of this town, and the rest of the continent would be more at liberty. 3. We could counteract him here, better than in many other places. 4. He would leave New England and New York at leisure to kill or catch Burgoyne. In all events you may rejoice and sing, for the season is so far gone that he cannot remove to you. 202. JOHN ADAMS. Philadelphia, 24 August, 1777. My dearest Friend,--We had, last evening, a thunder-gust very sharp and violent, attended with a plentiful rain. The lightning struck in several places. It struck the Quaker almshouse in Walnut Street, between Third and Fourth Streets, not far from Captain Duncan's, where I lodge. They had been wise enough to place an iron rod upon the top of the steeple, for a vane to turn on, and had provided no conductor to the ground. It also struck in Fourth Street, near Mrs. Cheesman's. No person was hurt. This morning was fair, but now it is overcast and rains very hard, which will spoil our show and wet the army. 12 o'clock.