General Gage's position at this time was a trying one for a man of his temperament. In an unguarded moment he had assured the king that four regiments ought to be enough to bring Massachusetts into an attitude of penitence. Now Massachusetts was in an attitude of rebellion, and he realized that he had not troops enough to command the situation. People in England were blaming him for not doing something, and late in the winter he received a positive order to arrest Samuel Adams and his friend John Hancock, then at the head of the new provisional government of Massachusetts, and send them to England to be tried for high treason. On the 18th of April, 1775, these gentlemen were staying at a friend's house in Lexington; and Gage that evening sent out a force of 800 men to seize the military stores accumulated at Concord, with instructions to stop on the way at Lexington and arrest Adams and Hancock. But Dr. Warren divined the purpose of the movement, and his messenger, Paul Revere, succeeded in forewarning the people, so that by the time the troops arrived at Lexington the birds were flown. The soldiers fired into a company of militia on Lexington common and slew eight or ten of their number; but by the time they reached Concord the country was fairly aroused and armed yeomanry were coming upon the scene by hundreds. In a sharp skirmish the British were defeated and, without having accomplished any of the objects of their expedition, began their retreat toward Boston, hotly pursued by the farmers who fired from behind walls and trees after the Indian fashion. A reinforcement of 1200 men at Lexington saved the routed troops from destruction, but the numbers of their assailants grew so rapidly that even this larger force barely succeeded in escaping capture. At sunset the British reached Charlestown after a march which was a series of skirmishes, leaving nearly 300 of their number killed or wounded along the road. By that time yeomanry from twenty-three townships had joined in the pursuit. The alarm spread like wildfire through New England, and fresh bands of militia arrived every hour. Within three days Israel Putnam and Benedict Arnold had come from Connecticut and John Stark from New Hampshire, a cordon of 16,000 men was drawn around Boston, and the siege of that town was begun. [Sidenote: Capture of Ticonderoga, May 10, 1775.] [Sidenote: Washington appointed to command the army, June 15, 1775.] [Sidenote: Charles Lee.]