explains situation in letter to McClellan, [44]-[46];
urges him to strike, [46];
annoyed by politicians, [47];
tries to forward troops, [48];
orders McDowell to join McClellan without uncovering capital, [50], [51];
criticised by McClellan, [51];
refuses to let McDowell move in time, [52];
sends McDowell to rescue Banks, [52];
insists on McDowell's movement, [55];