atzerodt has just concluded. the attack that booth outlined is to go into effect immediately. at 10:15 louis powell is to kill secretary of state seward in his home on lafayette square. david herold will guide powell out of the city via the navy yard bridge. george atzerodt is to kill vice president johnson at the kirkwood house hotel. the only change in the plan is that booth will not be attending aladdin at grover's. >> hello, john. he will kill lincoln at ford's theater. it's still early in act two. booth has calculated that the appointed time of 10:15 will fall at the beginning of act three of our american cousin and it will be an intermission between the acts. booth retrieves his horse from