Cheerily appears in this minstrel song, 1847:
Negro Fisherman
Ethiopian Serenaders
First lines-

Lightly our boat flies ober the sea,
Pull away merrily, sing cheerily,
Dinah is certainly waiting for me,
...........etc.

Also called The Darkey's Boat Song, sung by Murphy et al. Minstrels, 1853; slightly changed words.

In Levy Collection