Source : Webster's Revised Unabridged Dictionary (1913)

Contented \Con*tent"ed\, a.
   Content; easy in mind; satisfied; quiet; willing. --
   {Con*tent"ed*ly}, adv. -- {Con*tent"ed*ness}, n.

Source : WordNet®

contentedly
     adv : with equanimity; "`I bought it,' she said contentedly"