Haldirriel asked for a drabble about either Haldir or Legolas. Haldir volunteered.
Darkness hung over Dimrill Dale; vapours rose above Nan Curunír; trees spoke of trouble felt in the roots, of evil abroad upon the earth. Orthanc was rising. The Age was closing.
Closing over us.
Could hobbits hold back this Darkness?
"Come," Haldir murmured to his brothers; "There are those who must know of this..."
See 'Farewell to Lorien' in FOTR, where Haldir describes his activities to the hobbits the day of their departure.