Source : Webster's Revised Unabridged Dictionary (1913)

Calmly \Calm"ly\, adv.
   In a calm manner.

         The gentle stream which calmly flows.    --Denham.

Source : WordNet®

calmly
     adv 1: with self-possession (especially in times of stress); "he
            spoke calmly to the rioting students"
     2: in a sedate manner [syn: {sedately}]