On the Mississippi

Through wild and tangled forests
   The broad, unhasting river flows—
   Spotted with rain-drops, gray with night;
     Upon its curving breast there goes
A lonely steamboat's larboard light,
       A blood-red star against the shadowy oaks;
Noiseless as a ghost, through greenish gleam
Of fire-flies, before the boat's wild scream—
          A heron flaps away
          Like silence taking flight.