From The Collaborative International Dictionary of English v.0.48:
Agreeably \A*gree"a*bly\, adv. 1. In an agreeably manner; in a manner to give pleasure; pleasingly. "Agreeably entertained." --Goldsmith. [1913 Webster]
2. In accordance; suitably; consistently; conformably; -- followed by to and rarely by with. See Agreeable, 4. [1913 Webster]
The effect of which is, that marriages grow less frequent, agreeably to the maxim above laid down. --Paley. [1913 Webster]
3. Alike; similarly. [Obs.] [1913 Webster]
Both clad in shepherds' weeds agreeably. --Spenser. [1913 Webster]