carry large coaches, and likely served for carrying horses and artillery during the crossing), a large number of Durham boats were used to transport soldiers across the river. These boats were designed to carry heavy loads from the Durham Iron Works, featured high sides and a shallow draft, and could be poled across the river. The boats were operated by experienced watermen. Most prominent among them were the men of John Glover's Marblehead Regiment, a company of experienced seamen from Marblehead, Massachusetts. These men were joined by seamen, dockworkers, and shipbuilders from Philadelphia, as well as local ferry operators and boatsmen who knew the river well, most notably Kirby Francis Kane, of Rhode Island. Crossing On the morning of December 25, Washington ordered his army to prepare three days' food and issued orders that every soldier be outfitted with fresh flints for their muskets. He was also somewhat worried by intelligence reports that the British were planning their own crossing once the Delaware was frozen over. At 4 pm Washington's army turned out for its evening parade, where the troops were issued ammunition, and even the officers and musicians were ordered to carry muskets. They were told that they were departing on a secret mission. Marching eight abreast in close formations and ordered to be as quiet as possible, they left the camp for McConkey's Ferry. Washington's plan required the crossing to begin as soon as it was dark enough to conceal their movements on the river, but most of the troops did not reach the crossing point until about 6 pm, about ninety minutes after sunset. The weather got progressively worse, turning from drizzle to rain to sleet and snow. "It blew a hurricane," recalled one soldier. Washington had given charge of the crossing logistics to his chief of artillery, Henry Knox. In addition to the crossing of large numbers of troops (most of whom could not swim), he had to safely transport horses and eighteen pieces of artillery over the river. Knox wrote that the crossing was accomplished "with almost infinite difficulty", and that its most significant danger was floating ice in the river. One observer noted that the whole operation might well have failed "but for the stentorian lungs of Colonel Knox". The unusually cold weather of the 1770s and the icy river were likely related to the Little Ice Age. Washington was among the first of