to make final preparations, and then sailed for New London late on September 5, intending to make a nighttime landing. However, contrary winds prevented the transports from reaching the port until it was already daylight on September 6. In the early hours of that morning, Rufus Avery witnessed the fleet's arrival as a colonial officer stationed at Fort Griswold: ... about three o'clock in the morning, as soon as I had daylight so as to see the fleet, it appeared a short distance below the lighthouse. The fleet consisted of thirty-two vessels.... I immediately sent word to Captain William Latham, who commanded [Fort Griswold], and who was not far distant. He very soon came to the fort, and saw the enemy's fleet, and immediately sent a notice to Col. William Ledyard, who was commander of the harbor, Fort Griswold, and Fort Trumbull. Upon receiving the alert, Ledyard sent a messenger to notify Governor Jonathan Trumbull and local militia leaders of the British arrival, and went to Fort Griswold to arrange its defenses. Fort Griswold's guns were fired twice, a signal of enemy approach. However, one of the British ships fired a third round, changing the meaning of the signal to indicate the arrival of a victorious friend. This signal confusion led to delays in mustering militia companies. At sunrise on September 6, the British landed on both sides of the mouth of the Thames River. The people of the town could do nothing but evacuate, and several ships in the harbor escaped upstream. The 800-man detachment that Arnold led in New London met with no resistance. The defenders of Fort Trumbull, 23 men led by Captain Shapley, fired a single volley, spiked the guns, and boarded boats to cross the river to Fort Griswold, following orders left by Colonel Ledyard. Seven of Shapley's men were wounded, and one of the boats was captured; the detachment that Arnold sent to take Fort Trumbull sustained four or five killed or wounded, according to Arnold's account. Arnold's troops continued into the town where they set about destroying stockpiles of goods and naval stores. Under the orders given, parts of the town were supposed to be spared, some of which was the property of those secretly loyal to the British, but at least one of the storehouses contained a large quantity of gunpowder, which Arnold evidently had not known. When it ignited, the resulting