THREE:The army of Lord Cornwallis, which had so triumphantly pursued Washington through the Jerseys, supposing the Americans now put beyond all possibility of action, if not wholly dispersed, lay carelessly in their cantonments on the left bank of the Delaware. The two main outposts, Trenton and Bordentown, were entrusted to bodies of Hessians. At Trenton lay Colonel Rahl, and at Bordentown Count Donop. As the Christmas of 1776 was approaching, they had abandoned all discipline. The British officers, too, had mostly quitted their regiments, and had gone to enjoy the Christmas at New York, where General Howe was keeping up great hospitality, imagining the war to be fast drawing to a close. But if the English paid no attention to Washington, he was paying every attention to them. His plans arranged, he set out on the evening of Christmas day, 1776, and crossed the river at Mackonkey's Ferry, nine miles above Trenton, to attack that fort. The river was so encumbered with ice that he found it a most arduous undertaking, but he accomplished it with the division immediately under his commandtwo thousand four hundred in number. He continued his march through the night on Trenton, and reached it at about eight o'clock in the morning. A trusted spy had informed him over night, that he had seen the soldiers, both British and Hessians, asleep, steeped in drink. When he arrived, the soldiers still lay sunk in their Christmas debauch; and it was only by the first crash of the cannon that they were roused. When they ran to arms Washington had already invested the town. The brave Colonel Rahl, in his endeavour to form his drunken troops, and lead them on, was mortally wounded by an American rifle, almost at the first discharge. The light horse and a portion of the infantry, who fled on the first alarm, escaped to Bordentown. The main body attempted to retreat by the Princeton Road, but found it already occupied by Colonel Hand and his regiment of Pennsylvanian riflemen. Thus cut off, ignorant of the force opposed to them, and without enthusiasm for the cause, they threw down their arms and surrendered. About a thousand prisoners and six cannon were taken. The Americans had two killed, two frozen to death, and a few wounded. As soon as Washington had refreshed his men, he re-crossed the Delaware, carrying with him his prisoners, the stores he had taken, and the six field-pieces that he brought with him.The introduction of the steam-engine, railroads, and canals enabled the coal-miners during this reign to extend the supply of coals enormously. In 1792 the coal-mines of Durham and Northumberland alone maintained twenty-six thousand two hundred and fifty persons, and employed a capital of three million one hundred and thirty thousand poundsa very small amount of both people and money as compared with the workers and capital engaged in the trade since the expansion of the manufacturing and steam systems. The coal-fields of Durham and Northumberland extend to nearly eight hundred square miles, but the beds in Northumberland, Durham, Yorkshire, the Midland Counties, South of Scotland, and Ireland, are still immense and not yet fully explored. Fresh strata are discovered as steam power enables us to go deeper. In 1817 Sir Humphry Davy perfected his safety-lamp, which, by means of a simple wire gauze, enabled the miner to work amid the most explosive gases. These lamps, however, were not able to protect the colliers from their own carelessness, and most horrible destruction, from time to time, took place amongst them from neglect.